A 17. 5 ml sample of an acetic acid (ch3co2h) solution required 29. 6 ml of 0. 250 m naoh for neutralization. The concentration of acetic acid was __________ m

Answers

Answer 1

Acetic acid is an organic compound with the formula CH3COOH. It is a carboxylic acid consisting of a methyl group that is attached to a carboxyl functional group. The concentration of acetic acid was 0.423M.

Acetic acid reacts with NaOH to form: - CH3CO2H + NaOH —- CH3CO2Na + H2O
That is, the moles of NaOH added equal the moles of acetic acid in the solution.
To solve the problem, find the moles of NaOH added to find the moles of acetic acid and its concentration using its volume as follows: Moles of NaOH: - 29.6ml= 0.0296L (0.250mol/L) = 0.0074 moles of NaOH= moles of acetic acid.
Acetic acid molarity is 0.0074moles/0.0175L = 0.423 M.

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Related Questions

A system that does no work but which transfers heat to the surroundings has ___________________.
Answer
a. q < 0, ?E > 0
b. q > 0, ?E < 0
c. q > 0, ?E > 0
d. q < 0, ?E < 0
e. q < 0, ?E = 0

Answers

A system that does no work but which transfers heat to the surroundings has , the correct option is d) q < 0 , ΔE < 0.

The expression between the heat , the work and the internal energy is as follows :

ΔE = q + w

If no work is done by the system means w will be zero, The formula for the internal energy is as follows :

ΔE = q + w

ΔE = -q + 0

ΔE = -q

The  internal energy is less than zero and the value of the heat is less than the zero.

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calculate the ph of a 6.5×10−2 m solution of butyric acid.

Answers

pH of a 6.5 × 10^-2 M solution of butyric acid is 6.07 and the calculation part is below.

The pH of a 6.5 × 10^-2 M solution of butyric acid can be calculated as follows:

Calculate the concentration of hydronium ions (H3O+) in the solution:

Butyric acid (HC4H7O2) is a weak acid, which means that only a small fraction of it dissociates into its ions in solution. The dissociation reaction can be represented as follows:

HC4H7O2 + H2O ⇌ H3O+ + C4H7O2-

The concentration of hydronium ions can be calculated using the acid dissociation constant (Ka) for butyric acid and the initial concentration of butyric acid:

Ka = [H3O+][C4H7O2-] / [HC4H7O2]

[H3O+] = Ka * [HC4H7O2] = 1.3 × 10^-5 * 6.5 × 10^-2 = 8.45 × 10^-7

Calculate the pH:

The pH of a solution is defined as the negative logarithm of the hydronium ion concentration:

pH = -log[H3O+] = -log(8.45 × 10^-7) = 6.07

So, the pH of a 6.5 × 10^-2 M solution of butyric acid is 6.07.

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an amino acid that does not derive its carbon skeleton at least in part from oxaloacetate is

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Proline is an amino acid that does not, at least partially, get its carbon skeleton from oxaloacetate. Because proline is a nonessential amino acid, the body may make it from other molecules.

Amino and carboxylic acid functional groups can both be found in organic compounds known as amino acids. Of the many different amino acids found in nature, alpha-amino acids, which are the building blocks of proteins, are by far the most important. There are just 22 alpha amino acids in the genetic code. The primary structural functional groups of alpha, beta, gamma, or delta-amino acids can be categorised; further classifications relate to polarity, ionisation, and the type of side chain group (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). After water, proteins made of amino acid residues make up the second-largest portion of human muscles and others tissue.

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Suppose you are hiking through the woods and see many flowers of different colors, shapes, and sizes. You decide to create a taxonomic key to help you identify the flowers. What
characteristics would you include in the key?

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The characteristics I would include in the key would be the flower's color, shape, size, petal count, and any other distinguishing features such as the presence of a scent or a particular pattern on the petals. Additionally, I would include information about the flower's habitat, such as whether it grows in the shade or in the sun, and the type of soil it prefers.

what is observed when water (in the presence of an acid) is added to 2-methyl-2-pentene?

Answers

When we add the water in the presence of the sulfuric acid to 2-methyl-2-pentene , then the product formed is 2-methyl-2-pentanol.

The sulfuric acid acts as the catalyst, in the reaction when  the water to added to the carbon double bond of the 2-methyl-2-pentene molecule. The reaction is expressed as :

CH₃-C = CH₂-CH₂-CH₂  + H₂O  +  H₂SO₄----> CH₃-C(CH₃) - CH₂ - CH₂ - CH₂

          |                                                                        |

         CH₃                                                                 OH

2-methyl-2-pentene                                            2-methyl-2-pentanol

This is an example of the addition reaction. The reaction is the exothermic, that means it releases the heat energy and the hydroxyl group will attached to the carbon atom, that is the alcohol-functional group.

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How do we use this percent composition in our daily lives?

Answers

Answer: you could use it for sceinstest stuff hom someting broke down

Explanation:

hydrogen has the same number of valence electrons as which family

Answers

All of the elements in Group I (alkali metals and hydrogen) have one electron in the outer shell.

All of the elements in Group 1 only have one valence electron. Examples include lithium (Li), sodium, and hydrogen (H) (Na). Group 18 elements all have eight valence electrons (except for helium, which has a total of just two electrons). Neon (Ne), argon (Ar), and krypton are some examples (Kr). The periodic table's hydrogen is a particularly unique element that does not fall under any family. Despite being a member of Group I, hydrogen is not an alkali metal. The group IV elements and carbon share the most similarities with hydrogen in terms of thermodynamic parameters (ionization energy, electron affinity).

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the lattice energy of naoh is -900 kj/mol. when 2.990 g of naoh is dissolved in water, 3.33 kj of heat is released. calculate the enthalpy of hydration of naoh.

Answers

The lattice energy of NaOH is -900 kj/mol. when 2.990 g of naoh is dissolved in water, 3.33 kj of heat is released. The enthalpy of hydration of naoh is 70.6 kJ/mol.

The enthalpy of hydration is the amount of heat released or absorbed when a substance dissolves in water.

To calculate it, we need to subtract the heat of solution due to the breaking of the solid lattice of the solute from the total heat released during the solution process.

First, we need to convert the mass of NaOH to moles:

2.990 g / (40.0 g/mol) = 0.07475 moles

Next, we can calculate the heat of solution due to the breaking of the solid lattice:

0.07475 moles * (-900 kJ/mol) = -67.3 kJ

Finally, we can calculate the enthalpy of hydration:

ΔHhydration = ΔHsolution - ΔHlattice

ΔHhydration = 3.33 kJ - (-67.3 kJ) = 70.6 kJ/mol

So, the enthalpy of hydration of NaOH is 70.6 kJ/mol.

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reaction order is always defined in terms of both reactant and product concentrations. True or false?

Answers

Answer:

False

Explanation:

Reaction order is always defined in terms of both reactant and product concentrations. True or false?

False. The number of species whose concentration directly influences the rate of reaction is indicated by the sequence of reactions. The reactant concentrations are always used to specify the sequence of the reactions (but not with product concentrations).

The power dependence of the rate on the concentration of each reactant is the definition of the order of reaction. The rate law of a reaction can be used to fully comprehend the composition of the reaction mixture once that rule has been established. In other words, the reaction order is an exponent that increases the concentration of a certain species, and it demonstrates the extent to which this concentration impacts the rate of reaction. Additionally, it shows the range in which the species has a large impact.

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If 4. 52g of the precipitate is formed, how many grams of sodium chloride reacted?​

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If 4. 52g of the precipitate is formed, there would be 1.8 grams of sodium chloride reacted.

First we should write the balance reaction

AgNO₃(aq)+NaCl(aq)→AgCl(s)⏐↓+NaNO₃(aq)

We can observe that there is a 1:1 reaction. As a result, producing 1 mole of the precipitate from 1 mole of sodium chloride (AgCl).

In this case,

we should find the moles of sodium chloride used by dividing the mass by the mass molar of sodium chloride.

Precipitate formed in terms of moles: 4.52g/143.32 g/mol

The amount of precipitate that produced was 0.0315 moles.

Thus, 0.0315 moles of NaCl and 0.0315 moles of precipitate were generated.

Therefore NaCl reaction mass is 0.0315 moles times 58.5 g/mol, or 1.8 g.

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f the mass percent of sulfur in al2(so4)3 is 28.1%, what is the mass of sulfur atoms in grams in 14.8 grams of al2(so4)3?

Answers

The mass of sulfur atoms in grams in 14.8 grams of al2(so4)3 is equal to 3.9g

We are informed that this chemical contains 28.1% Sulphur by mass.

This implies that any sample of this substance Additionally, this molecule is Al2 SO4 3. Therefore, sulphur will account for 0.1% of the mass in any sample size of this 28. Therefore, 28.1% of that, whether we have a one g sample or a 1000 g sample, will be attributed to the sulphur. We therefore have a 14 g sample in this inquiry. In order to locate the sulphur mass. Okay, we must multiply the percentage of 28.1 by mass by the sample size, which is 14 g. The quantity of Sulphur in this sample is therefore going to be 3.9 g And I rounded that to two significant digits since 14 only had two significant digits.

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a 275.0 μl water sample was analyzed for cadmium. calculate this volume in cubic centimeters (cm3).

Answers

The volume in cubic centimetres is 0.275 cubic cm.

We know that

1 millilitre = 1 cubic centimetre

1 litre =  1 cubic metre  

275.0 μl water sample  =  275 microlitres

275 microlitres =  0.275 mililitre

                         =  0.275 cubic cm

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The ions formed when mgi₂ dissociates in water are?

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When magnesium iodide (MgI₂) dissociates in water, it produces two Mg2+ cations and two I- anions, according to the following equation:

MgI₂(aq) → Mg2+(aq) + 2I-(aq).

Chemical reactions are processes in which atoms or molecules of one or more substances are rearranged to form new substances with different properties. Chemical reactions involve the breaking and forming of chemical bonds, which releases or absorbs energy.

For example, a reaction between hydrogen and oxygen can form water, which has different properties than the two gases. During a chemical reaction, the starting materials, or reactants, are transformed into new substances, or products. Chemical equations can be used to represent chemical reactions, which allow us to calculate the amount of reactants and products that are involved.

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True /False 1. Aluminum chloride is a chemical compound with a chemical formula equivalent to AlCl3 or Al3Cl3.

Answers

False; the true sentence is: Aluminum chloride is a chemical compound with the chemical formula equivalent to AlCl3.

What is a chemical compound?

A chemical compound is a substance composed of two or more elements chemically combined in a fixed proportion. An example of a chemical compound is water (H2O), which is composed of two hydrogen atoms and one oxygen atom chemically combined in a fixed ratio.

Chemical compounds have unique properties that are different from the elements that make them up, and they can only be separated into their constituent elements through chemical reactions.

For example, water can be separated into hydrogen and oxygen gas by electrolysis, but these elements cannot be combined to form water unless they are subjected to the right conditions of temperature, pressure, and energy.

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As concentration increases, a solution's vapor pressure______ and its osmotic pressure _________A. increases, increases B. increases, decreases C. decreases, increases D. decreases, decreases E. increases, stays the same

Answers

As concentration increases, a solution's vapor pressure decreases and its osmotic pressure increases. Hence, option A is correct.

What happens when concentration increases?

Osmotic pressure of a solution is proportional to the molar concentration of  solute particles in the solution and as soon as the solute molecules increases, osmotic pressure of solution increase.

When non-volatile solute is dissolved in volatile solvent, vapor pressure of the solvent is reduced. As concentration of the solute increases, then the vapor pressure of the solvent decreases.

Po = pgh= psp log ; where Po is osmotic pressure corresponding to a solution at the bottom of column and solvent pressure p, p is mean density of the column, h is its height.

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Because there are only 26 letters in the alphabet, we could not give every element and one-letter symbol. We would have run out of letters after element 26 (Iron). To solve this problem, most elements have a two-letter symbol.

When an element has a two-letter symbol, what is the rule that must be followed?

Question 1 options:

Both letters are lower-case.


There is no rule; capitalization has no significance in chemistry.


The first letter is capitalized and the the second letter is lower-case.


Both letters are capitalized.

Answers

When an element has a two-letter symbol, the rule is that the first letter is capitalized while the second letter is in lowercase. Option 3.

Writing two-letter symbols of elements

In writing two-letter symbols of elements, the first letter is usually capitalized while the second letter is retained in lowercase. Some examples are highlighted below:

The Latin name of silver is Argentum. Thus, the symbol of silver is Ag.The Latin name of mercury is Hydrargyrum. Thus, the chemical symbol of mercury is HgLead is PbIron is Fe

In other words, the number one rule guiding the writing of two-letter chemical symbols is that the first letter must be in the capital while the second letter would be in lowercase.

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P
1.2 mol Zn and 5.5 mol HCl react according
to the equation
Zn + 2HCl → ZnCl₂ + H₂.
If the limiting reactant is Zn, calculate the
amount of ZnCl₂ formed.
Answer in units of mol. Answer in units of
mol.
outs
porad
mol.
******
002 (part 2 of 2) 10.0 points
Calculate the amount of H2₂ formed.
Answer in units of mol.

Answers

Taking into account the reaction stoichiometry, 1.2 moles of ZnCl₂ and 1.2 moles of H₂ are formed if 1.2 mol Zn and 5.5 mol HCl react and the limiting reactant is Zn.

Reaction stoichiometry

The balanced reaction is:

Zn + 2 HCl → ZnCl₂ + H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Zn: 1 moleHCl: 2 molesZnCl₂: 1 moleH₂: 1 mole

Mass of each product formed

The following rules of three can be applied, considering the limiting  reactant:

if by reaction stoichiometry 1 mole of Zn form 1 mole of ZnCl₂, 1.2 moles of Zn form how many moles of ZnCl₂?

moles of ZnCl₂= (1.2 moles of Zn× 1 mole of ZnCl₂)÷ 1 mole of Zn

moles of ZnCl₂= 1.2 moles

if by reaction stoichiometry 1 mole of Zn form 1 mole of H₂, 1.2 moles of Zn form how many moles of H₂?

moles of H₂= (1.2 moles of Zn× 1 mole of H₂)÷ 1 mole of Zn

moles of H₂= 1.2 moles

Finally, 1.2 moles of ZnCl₂ and 1.2 moles of H₂ are formed.

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Help me figure out what the answer to this is, organic chemistry confuses me

Answers

The name of the compound is 1- methyl cyclopropane.

How do you name the cyclo alkane?

Cycloalkenes are named using the same basic system as alkenes, with a few additional considerations.

Identify the parent hydrocarbon: The parent hydrocarbon is the longest continuous chain of carbon atoms that includes the double bond.

Number the parent chain: Number the carbon atoms in the parent chain such that the double bond has the lowest possible number.

Give the prefix "cyclo-" to indicate the presence of a ring: The prefix "cyclo-" is added to indicate that the parent chain forms a ring.

Indicate the location of the double bond: The location of the double bond is indicated by listing the two numbers of the carbons in the double bond.

Name the alkene: Finally, the suffix "-ene" is added to indicate the presence of a double bond.

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The pKa values for arginine are: pK1 = 2.17, pK2 = 9.04, pKR = 12.48.
a. Draw the structure of arginine at pH 11.
b. Estimate the pI of arginine. Show your work.

Answers

The pKa values for arginine are: pK1 = 2.17, pK2 = 9.04, pKR = 12.48.

a. Structure of arginine at pH 11 is attached in the image below.

b.The pI of arginine can be estimated using the pKa values as follows:

pI = (pK1 + pK2) / 2

In this case:

pI = (2.17 + 9.04) / 2 = 5.605

So, the estimated pI of arginine is approximately 5.605.

Amino acids contain both acidic and basic functional groups. The isoelectric point or pI is the pH of a solution wherein the net charge of the amino acid becomes zero. It can be calculated by taking the average of the pKa values.

Arginine (Arg or A) have 3

pKa values:

pKa(3) =1.82;

pKa(3) = 8.99;

pKa(3) = 12.48

What is the pI for arginine?

10.76

The isoelectric point (pI) of arginine is 10.76, which is the highest among the protein amino acids.

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what is the highlighted 2 in this portion of a chemical reaction called? 3h20 T/F

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The highlighted "2" in this portion of a chemical reaction is the coefficient of the molecule, indicating the number of molecules present in the reaction.

The coefficient is used to balance chemical reactions and ensure that the number of atoms of each element remains constant before and after the reaction.

A chemical reaction is a process that results in the transformation of one set of chemical substances into another. It involves the rearrangement of atoms and the formation and breaking of chemical bonds. Chemical reactions can be represented using chemical equations, which indicate the reactants (the starting substances) on the left side and the products (the resulting substances) on the right side, separated by an arrow.

The rate of a chemical reaction depends on several factors, including the concentration of the reactants, the presence of a catalyst, and the temperature. Understanding chemical reactions is important in many areas of chemistry, including the design of new materials, the development of new energy sources, and the understanding of biological processes.

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Select the correct net ionic equation for the ionic equation given below. Ca(s) + 2H+ (aq) + 2Cr (aq) + Ca(aq) + H2(g) + 2Cl(aq) Click the answer you think is right. A. Ca(s) + 2Cr (aq) → Ca?"(aq) + 2Cl(aq) B. Ca(s) + 2H" (aq) → Ca" (aq) + H (9) C. There is no net ionic equation. D. 2H(aq) → H,9)

Answers

The correct net ionic equation for the ionic equation given below is  Ca(s) + 2Cr (aq) → Ca"(aq) + 2Cl(aq).

What is the equation ?

The equation is a mathematical statement that shows the relationship between different values. It usually consists of an equal sign (=) and two or more variables that are related to each other. The variables can be numbers, symbols or other mathematical objects. By manipulating the equation, different values can be found for the variables involved. Equations are used to describe many different physical concepts, such as motion, force, energy, and chemical reactions.They can also be used to solve problems in fields such as economics, engineering, and mathematics.

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Please help will give brainliest

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Changes in precipitation and snowmelt patterns, withdrawal of ground water for drinking, irrigation, and other human uses, and impervious paved surfaces that prevent precipitation from recharging ground water are all stressors that can deplete aquifers. It may take thousands of years to replenish some deep aquifers.

What are the two main causes of groundwater pollution?

There are two types of groundwater contaminants: point sources and distributed, or non-point sources. Point sources include landfills, leaking gasoline storage tanks, leaking septic tanks, and accidental spills.

Deforestation, unscientific agricultural methods, chemical effluents from industries, and a lack of sanitation all contribute to groundwater pollution, rendering it unusable.

Thus, Some deep aquifers may take thousands of years to fill again.

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The chemical equation below shows the reaction between tin (Sn) and hydrogen fluoride (HF).

Sn + 2HF Right arrow. SnF2 + H2

The molar mass of HF is 20.01 g/mol. How many moles of Sn are required to react completely with 40 g of HF?
1 mole
2 moles
3 moles
4 moles

Answers

Answer:

1 mole of Sn

Explanation:

The balanced equation tells us that 2 moles of HF react with every 1 mole of Sn.  That's a molar ratio of 1/2.  We need half as many moles of Sn as we have of HF.  Lets determine the moles of HF that are in 40 g of the material.  The molar mass of HF is (1 + 19) = 20 grams/mole.

40 grams of HF means we have 2 moles of HF:  (40g HF)/(20 grams/mole HF) = 2 moles HF.  Since the molar ratio is 1/2, we only need 1 mole of Sn for this reaction.

how many grams in a mg

Answers

In the metric system, a milligram equals one gram. a unit being used measuring systems to express weight and mass.

How would a gram have weight or mass?

Not weight but mass is measured in milligrams. Mass would be a measurement of how much matter an object contains, whereas weight relates to the earth's gravitational pull on it. Knowing an object's mass is essential since it allows you to determine how so much effort will be needed to move it.

What dimensions does a gram have?

A gram is a unit of mass equal to one thousandth of a kilogram, or roughly the amount of one cubic millimeter of water.

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what is the mass of 7.11x10^24 particles of potassium oxide?

Answers

The mass of 7.11 x 10^24 particles of potassium oxide can be calculated if we know the molar mass of potassium oxide. The molar mass of potassium oxide (K2O) is approximately 94 g/mol. Therefore, the mass of 7.11 x 10^24 particles of potassium oxide can be calculated as follows:

mass = 7.11 x 10^24 particles x 94 g/mol / Avogadro's number

where Avogadro's number is approximately 6.02 x 10^23 particles per mole. The exact mass will depend on the precision of the molar mass and the number of particles.

TRUE or FALSE. Believing that, with training, you will be able to run two miles without stopping by the end of the semester demonstrates self-efficacy.

Answers

The statement  "Believing that, with training, you will be able to run two miles without stopping by the end of the semester demonstrates self-efficacy." is True.

Self-efficacy is an individual's belief in their ability to successfully perform a specific task or complete a particular goal. Believing that, with training, you will be able to run two miles without stopping by the end of the semester is a demonstration of self-efficacy. This belief in one's abilities can have a significant impact on motivation, effort, and performance, as individuals who have high self-efficacy are more likely to set challenging goals and persist in the face of obstacles and setbacks.

Self-efficacy can be developed and strengthened through various experiences, including mastery experiences (successes), vicarious experiences (observing others), emotional and physiological states, and social persuasion. An individual's self-efficacy can also be affected by situational and dispositional factors, such as their confidence, past experiences, and the difficulty of the task at hand.

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Bed bugs might sound like an old-fashioned problem, but now they are back with a vengeance. Fifty years ago, the blood-sucking pests were nearly eradicated in the united states thanks in part to the use of pesticides like ddt. Today, they are creeping over sheets and tormenting sleepers across the country. New york was recently declared america's most bed-bug-infested city in america. In the past, we countered the bed bugs by using pesticides called pyrethrins and pyrethroids. These compounds work by attacking the nervous system. Insects have channels in the membranes of their nerve cells that can be opened to allow sodium into the cells, triggering a nerve impulse. Pyrethrins and pyrethroids alter the nervous system by binding to the sodium channels, locking them in the open position. This allows sodium to pour into the cell continuously, causing the nerve to fire repeatedly and eventually leading to paralysis. Todays bed bugs seem to be more resistant to the chemicals that previously killed them. Cases of resistance have been reported in all classes of pests: crop diseases, human diseases, weeds, rodents, and insects, with crises in insect control beginning shortly after the introduction of pesticide use in the 20th century. Why do insect pests become resistant so readily to the pesticides used for control?.

Answers

The use of pesticides widely and frequently, genetic heterogeneity among the insect population, and the process of natural selection all play a role in the fast evolution of pesticide resistance.

Due to natural selection, pest insects develop a resistance to insecticides. The insects that are most vulnerable to pesticides die out when pesticides are employed to manage bug populations, leaving behind the insects that are less vulnerable. These less vulnerable insects eventually reproduce and pass on their resistance to their progeny.

In addition, the extensive and regular use of pesticides can hasten the development of resistance. When pesticides are used frequently and in large quantities, the population of pests that are resistant to them will rise.

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A 5. 00-cm cube of magnesium has a mass of 217. 501 g. What is the density of magnesium metal?

Answers

densitydensity is the mass per unit volume. It is given by the formula; [tex]Density=\frac{mass}{volume}[/tex] . The density of given magnesium metal is 43.5002[tex]g/cm^{3}[/tex].

Use the following formula to calculate magnesium density: -[tex]P=\frac{m}{v}[/tex] ( where, p represents the density of the object, m represents the mass of the object and v represents volume of the object) ( where, p represents the density of the object, m represents the mass of the object and v represents volume of the object).
Substitute the following values into the formula: m=217.501g, v=5.00cm3, and p=x.
By plugging the values into the formula, we get: x= 217.501/5.00= 43.5002[tex]g/cm^{3}[/tex].
As a result, the density of the given magnesium metal is 43.5002g/cm3.

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A half-cell containing Hg2 +2 and Hg is connected to a half-cell containing Mg+2 and Mg to form a voltaic cell. Determine the proper direction for each half-cell reaction to assure a spontaneous, complete cell reaction. Find the value of the complete cell electrode potential (E°).

Answers

Answer:

Look up the standard reduction potentials for

Br and Mg. I find the following:Mg2+ +2e-=>

Mgls) E = -2.38 VBr2() +2e-==> 2Br-(aq) E°

If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure? responses.

Answers

Butane is the gas that will condense at the lowest pressure.

Condensation is the process through which matter transitions from its initial gaseous state into its final liquid state. For instance, condensation happens when water vapour in the air, which is in its gaseous state, comes into touch with a colder surface and turns into liquid water.

The process of condensation, which is the reverse of evaporation, converts airborne water vapor to liquid water. Because it causes clouds to develop, condensation is essential to the water cycle.

When warm air meets cold surfaces or when your home is too humid, condensation happens. This moisture-rich heated air immediately cools down and releases the water, which condenses into liquid droplets on the chilly surface when it comes into contact with it.

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Question_____series of lines are the only lines in hydrogen spectrum which appear in the visible region.ALymanBBalmerCPaschenDBrackettMedium the element europium exists in nature as two isotopes: has a mass of 150.9196 u and has a mass of 152.9209 u.the average atomic mass of europium is 151.96 u. calculate the relative abundance of the two europium isotopes. Which of the following behaviors is likely to have been acquired through the process of classical conditioning? A) a dog salivating when food enters its mouth B) a rat pressing a lever that has previously led food to drop into its bowl C) a human being wincing when he or she hears the dentist's drill D) both b&c Why does the fact that she might not like living in California make someone think renting a home is better than buying one?A. She cannot immediately come up with the large down payment required to buy a house.B. She expects mortgage rates to go down in the next year or two. (That has nothing to do with whether she likesC. She does not want to pay property taxes to support a place she might not like living in.D. If she decides to move, she will not have to deal with selling her home you are managing a landscaping project for the city. the project's purpose is to decorate the park to commemorate the city's 200th anniversary. the official flower is in short supply due to a heat wave in the area in which they are grown. therefore, the price per plant will be higher than originally planned. while a potential supplier shortage was an identified risk, it was not due to a heat wave causing a shortage in the supply chain. you are in the process of reassessing the project risks, but need to know what the tolerances for the original project risks were. where do you find this information? answers a. project management plan b. risk register c. risk reviews d. risk audit what do you mean by problem solving skill ? Select whether the relation is a function or not.((-3, 1), (-1, 3), (1, -2), (3, 3))A. not a functionB. function 2.1.Naira2804008002500Change each of the given amounts in Naira to the following currencies. Use the exchangerates given in the previous page.3750Pound sterlingAmount inUs dollarsCedisLeonesFranc (CFA)In each of the following are two equivalent amounts of money. Find the exchange rateterms of N1. Limit your answer to 2 decimal places.a. N150 = 18d. N80 = US$20b. 52 = N400e. N9.36 = Le 72h. N25 = 1 178 frsA book costs 3. If the rate of exchange is 1 = N8.33, find its cost in NairaMr Awolowo wants to send 500 to his brother in the United Kingdom How muchpay in Naira at the post office? Hemlock trees are found in parts of Tennessee along rivers and streams. Hemlocks are large trees like the Redwoods in California. They are being invaded by the hemlock woolly adelgid. They are crucial in keep streams and rivers cool for the survival of trout and other coldwater species. What could be a good way to control or destroy this invader Balanced the equation for this reaction, and answer the questions. ___ N2 + ___ H2 ___ NH3a) If 25. 0 g N2 and 18. 75 g H2 are used for this reaction, which reactant will be the limiting reactant? Show your proof. b) How much of the excess reactant will be left over? most babies are born with enough _______ to last about half a year. According to Newton's First Law, what potential impact can an unbalanced force have on an object in motion? Does our class have esp (extra sensory perception)? Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.Destiny is using ribbon to create girls' hair barrettes. For a craft fair in Booneville, she made 12 small barrettes and 14 large barrettes, using a total of 148 yards of ribbon. Then, for another craft fair in Newport, she made 12 small barrettes and 10 large barrettes, which used a total of 116 yards. How many yards of ribbon does Destiny use for each?Destiny uses yards of ribbon on each small barrette and yards on each large one. a second-stage smog alert has been called in a certain area of los angeles county in which there are 70 industrial firms. an inspector will visit 10 randomly selected firms to check for violations of regulations. (a) if 28 of the firms are actually violating at least one regulation, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation? What is the importance of the Define stage when designing a game?A.It helps programmers choose what color scheme to use when making sprites.B.It helps programmer decide what features and elements to include in their flowchart and pseudocode.C.It helps programmers understand their audience so they can market their game to them.D.It helps programmers find errors in the game so they will know what to do when restarting the cycle. certain date, there had been a total16,756 Performances of two Shows on broadway,with 3312 more Performances of Show A thanwere there ofShow B. How many Performanceseach show?There were _____ performances for Show A In what year did masujiro hashimoto establish the kwaishinsha motor car works the predecessor to datsun? when estimate the productivity of excavation activity (e.g. cy/day), the most reliable data source is typically: The distribution of age for players of a certain professional sport is strongly skewed to the right with mean 26.8 years and standard deviation 4.2 years. consider a random sample of 4 players and a different random sample of 50 players from the population. What would be true about the sampling distributions of the sample mean ages for samples of size 4 and samples of size 50?