Iron (iii) chloride is obtained by vapor condensation from the reaction between chlorine gas and iron fillings.
How can iron (iii) chloride be formed from iron fillings?Iron (ii) chloride can be formed from iron fillings in the laboratory as follows:
Iron fillings + Cl₂ → FeCl₃Chlorine gas is introduced into a reaction vessel containing iron fillings and the iron (iii) chloride vapor formed is obtained by condensation.
In conclusion, iron (iii) chloride is formed by the the direct combination of iron fillings and chlorine gas.
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which group is selected as secondary suffix if -OH and -CHO both are present in same compound
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula -OH and consists of an oxygen atom covalently bonded to a hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydroxyl groups. In organic chemistry, an aldehyde is an organic compound containing a functional group with the structure R-CH=O. The functional group itself is sometimes called an aldehyde, but it can also be classified as a formyl group. Aldehydes are ubiquitous and play an important role in technology and biology. The group priority is -OCH3>OH>COOH>CHO. According to the F. Cahn-Ingold-Prelog system, a priority (1, 2, 3, or 4) is assigned in descending order of atomic number to the atoms directly bonded to the stereocenter the atom with the highest atomic number gets the highest priority.
A 0.32 m aqueous solution of an unknown solute has a density of 1.08 g/ml. the molar mass of the solute is 146.8 g/mol. What is the molality of this solution?
According to molar concentration , the molality of the solution up to second decimal place is 0.31 m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kgThus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kgTo learn more about molar concentration refers to:
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According to molar concentration, the molality of the solution up to second decimal place is 0.31m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution. Most commonly used unit for molar concentration is moles/liter. The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.
The use of molarity.Understanding a solution's molarity is important since it allows you to determine the actual concentration as well as whether the solution is diluted or concentrated. Measures of solution concentration include molality and molarity.
Determination of molality:Molarity = 0.32 mol of solute / 1 L solution.
To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg.
To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution.
To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.
Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg
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The atomic mass of the element niobium (Nb) is 92.906 amu. Which measurement is correct?(1 point)
Responses
1 mole of Nb = 92.906 grams
1 mole of Nb = 92.906 grams
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 atoms
1 gram of Nb = 92.906 atoms
1 mole of Nb = 92.906 atoms
Niobium has an atomic mass of 92.90638 u. An atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 grammes.
What does the term "atomic" refer to?
Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. atomic is defined as an adjective that refers to, contains, or is related to atoms.
What does atomic energy entail?
Nuclear energy, also known as atomic energy, is the considerable quantity of energy released in operations that have an impact on atomic nuclei, or dense centres of atoms. It differs from other atomic phenomena' energy, which solely involves an atom's orbital electrons in regular chemical reactions, for example.
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Answer:
1 mole of Nb = 92.906 grams
A person uses 720 kcal on a long hike. Calculate the energy used for the hike in each of the following energy units. A.) joules B.) kilojoules
A person uses 720 kcal on a long bike. A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.
What is energy ?
The term energy is defined as the capacity for doing work. It is exist in different types like potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.
Given the energy used for the bike is 770 kcal.
We know that
1 cal = 4.184 J
The energy in Joules = 770 × 1000 × 4.184
= 3221680 J
The energy in kilojoules = 3221689 / 1000
= 3221.689 KJ
Thus, A. The energy in joules is equal to 3221680 Joules. B. The energy in kilojoules is 3221.689 KJ.
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A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute.
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. The expression to determine the number of gallons left in the tank after m minutes is 35- m/4.
Considering that a 35-gallon water tank leaks at a rate of a quarter per minute.
Let "m" stand for the duration in minutes.
Gallons remaining in the tank equal the sum of the water that was originally inside and the water that has leaked.
35 gallons of water are still available after subtracting the amount of minutes spent at the rate of leakage.
Water remaining in gallons = 35 gallons - m minutes x 1/4
Water remaining in gallons = 35 - m/4
Your question is incomplete but most probably your full question was
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. Write an expression to determine the number of gallons left in the tank after m minutes.
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A 0.1 m solution is diluted by three orders of magnitude. what is the new concentration?
So the new concentration of the solution is 0.0001M.
What is magnitude?A magnitude is the measurement or absolute value of a quantity. A magnitude is represented by a positive real number. Put simply, a magnitude is the size of some quantity. For example, the magnitude of an earthquake, measured on the Richter scale, usually varies between 1 and 10 and represents the size of the earthquake. An earthquake with a magnitude of 8 is much more trouble than an earthquake with a magnitude of 3.The magnitude of a number, unlike the magnitude of a physical quantity, is not relative to a scale or set of units: the magnitude of 100 is 100. By contrast, the magnitude of a ruler is 12 in inches but is 30.48 in centimeters. Outside of pure mathematics one has to be careful to specify the units in which the magnitude of some quantity is measured.To learn more about magnitude refer to:
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what is the number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen? a. 24 x 10 ^ 23
b. 6 x 10 ^ 23
c. 12 x 10 ^ 23
d. 18 x 10 ^ 23
The number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen is 1.79 * 10^24. So the answer is (a) 24 x 10 ^ 23
The balanced equation for the reaction of hydrogen gas (H2) with nitrogen gas (N2) to form ammonia (NH3) is:
2H2 + N2 -> 2NH3
If the reaction uses 6 grams of hydrogen gas, we can use the molar mass of hydrogen (2.02 g/mol) to find the number of moles of hydrogen used in the reaction:
6 g / 2.02 g/mol = 2.97 mol
Since the equation states that 2 moles of hydrogen are needed to produce 2 moles of ammonia, then 2.97 moles of hydrogen will produce 2.97 moles of ammonia.
To find the number of ammonia molecules, we multiply the number of moles by Avogadro's number:
2.97 mol * 6.022 * 10^23 molecules/mol = 1.79 * 10^24
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why is time an independent variable
what is the percent composition of hcl by numbers of atoms?
Answer:
H is 2.74%
Cl is 97.24%
Explanation:
HCl molar mass is 36.458
H is 1 so 1/36.458 is .0274 or 2.74 percent
Cl is 35.453 so 35.453/36.458 is .9724 or 97.24 percent
This is the last set of questions for the assignment
5) The theoretical yield of H₂O is 36.04g.
6) The theoretical volume of CO2 produced is 0.005 L.
7) The mass of water produced is 0.981g.
What is the theoretical yield of a reaction?The theoretical yield of a reaction is the maximum amount of product that can be produced from a given amount of reactants, assuming that the reaction goes to completion. To calculate the theoretical yield, we need to know the balanced equation for the reaction and the amounts of reactants used.
5) Given and unknown:
The balanced equation for the reaction is 2 H2(g) + O2(g) → 2 H₂O(1)
The amount of H2 used is 6
The amount of O2 used is 30g
Steps:
1. Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed. In this case, the limiting reactant is H2 because 6g of H2 will react completely with 6g of O2, while 30g of O2 will still have some remaining.
2. Calculate the theoretical yield of the product: The theoretical yield of H2O can be calculated by using the stoichiometry of the reaction. The balanced equation tells us that 2 moles of H2 react with 1 mole of O2 to form 2 moles of H2O. We can use the molar mass of H2 and O2 to convert the given mass of each reactant to moles, and then use the balanced equation to determine the theoretical yield of H2O.
Solution:
· Molar mass of H2 = 2.02 g/mol
· Molar mass of O2 = 32 g/mol
· 6g of H2 is equal to 6/2.02 = 2.97 moles
· 30g of O2 is equal to 30/32 = 0.9375 moles
· Since H2 is the limiting reactant, the reaction will consume 2.97 moles of H2.
· Using the balanced equation, 2 moles of H2 will produce 2 moles of H2O
· Therefore, the theoretical yield of H2O is 2 x 18.02 = 36.04 g
· Therefore, the theoretical yield of H₂O is 36.04g.
6) Given and unknown:
The balanced equation for the reaction is 2 C2H6(g) + 7 O2(g) → 6 H2O(l) + 4 CO2(g)
The volume of C2H6 used is 0.42L
The volume of O2 used is 3.12L
The unknown is the theoretical volume of CO2 produced
Steps:
Convert the volumes of reactants to moles using the ideal gas laws PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant and T is the temperature.
Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed.
Use the balanced equation to calculate the number of moles of CO2 produced.
Convert the moles of CO2 to volume using the ideal gas laws PV = nRT
Solution:
Ideal gas constant R = 8.314 J/mol*K
Temperature T = 298 K
Pressure P = 1 atm
Molar mass of C2H6 = 30.07 g/mol
Molar mass of O2 = 32 g/mol
Molar mass of CO2 = 44 g/mol
0.42L of C2H6 is equal to 0.42 x (1 x 10^3) / (8.314 x 298) = 0.0058 mol
3.12L of O2 is equal to 3.12 x (1 x 10^3) / (8.314 x 298) = 0.0433 mol
From the balanced equation, we can see that for every 2 moles of C2H6, 4 moles of CO2 are produced.
Therefore, 0.0058 mol of C2H6 will produce 0.0058 x 2 = 0.0116 mol of CO2
Finally, 0.0116 mol of CO2 will produce 0.0116 x (44/1000) = 0.005L of CO2.
Therefore, the theoretical volume of CO2 produced is 0.005 L
7) Given and unknown:
The balanced equation for the reaction is 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H₂O(1)
The mass of NH3 used is 1.54g
The mass of O2 used is 1.25g
The unknown is the mass of water produced
Steps:
Determine the limiting reactant: The limiting reactant is the reactant that will be completely consumed before the other reactant is consumed.
Use the balanced equation to calculate the number of moles of water produced.
Calculate the mass of water produced by using the molar mass of water
Solution:
Molar mass of NH3 = 17 g/mol
Molar mass of O2 = 32 g/mol
Molar mass of H2O = 18 g/mol
1.54g of NH3 is equal to 1.54 / 17 = 0.0906 mol
1.25g of O2 is equal to 1.25 / 32 = 0.0391 mol
From the balanced equation, we can see that for every 4 moles of NH3, 6 moles of H2O are produced.
Therefore, 0.0906 mol of NH3 will produce 0.0906 x 6 = 0.0544 mol of H2O
Finally, 0.0544 mol of H2O will produce 0.0544 x 18 = 0.981g of H2O
Therefore, the mass of water produced is 0.981g
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What is the limiting reactant if 4. 0 g of nh3 react with 8. 0 g of oxygen? o2 because it produces only 0. 20 mol of no. Nh3 because it produces only 0. 20 mol of no. O2 because it produces two times less no than nh3. Nh3 because it produces three times more no than o2.
The limiting reactant if 4. 0 g of nh3 react with 8. 0 g of oxygen is Oxygen because it produces only 0. 20 mol of NO. the option A is correct.
The reactant that is present in a chemical reaction at a lower concentration than the other reactant and determines the production of the product is known as the limiting reactant.
Ammonia dissociation's balanced equation is:
4NH₃ +5O₂⇒ 4NO +6H₂O
To react with 5 moles of oxygen, 4 moles of ammonia are needed.
The moles are listed as:
moles = mass/ mass molar
The available moles of ammonia in 4 gram is:
moles NH₃ = 4 /17 = 0.23 moles
moles oxygen = 8 / 16 = 0.25 moles
The moles of oxygen required for 0.23 moles of ammonia are:
5/4 x 0.23 = 0.28 moles
The amount of oxygen that is needed is 0.28 mol, yet there are only 0.25 mol of oxygen that are readily available. So, the limiting reagent is oxygen.
Therefore, choice A is right.
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What happened for the model of the atom to change?
The atomic model changes over time because the atomic model was based on theories and discoveries.
Dalton's Atomic ModelThe simplest atomic model is the Dalton atomic model, which was put forward by John Dalton, a British scientist. According to this atomic model, atoms are solid balls that have no charge. In addition, according to this atomic theory, the atom is the smallest unit that cannot be divided again. Different chemical elements will have different types of atoms.
Unfortunately, Dalton's theory cannot explain how atoms as solid balls can conduct electric current. In fact, electricity is electrons in motion. He could not prove other particles that conduct electric current. Dalton's theory was followed hundreds of years later until it was finally broken by later scientists.
Thompson's Atomic ModelThe second atomic model is the Thompson atomic model. As the name implies, this atomic model was discovered by Joseph John Thompson. Thompson's atomic model is shaped like a raisin bun. That's because the atom is a positively charged solid ball with negative particles (electrons) scattered in it. In addition, the number of positive and negative charges on the atom is the same. This atomic model was proven by Thomson's research using cathode ray tubes.
Unfortunately, Thomson's model of the atom cannot explain the arrangement of positive and negative charges in an atom.
Rutherford's Model of the AtomRutherford's atomic model put forward by Ernest Rutherford in 1911. In this atomic theory, each atom contains a positively charged atomic nucleus with electrons surrounding it in its trajectory. In addition, this atomic mass is concentrated in the atomic nucleus and most of the atomic volume is empty space, you know. This was proven from the results of an experiment on firing metal by alpha rays, which is also known as the Geiger-Marsden Experiment.
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When two identical copies of DNA molecules are produced which are exactly the same as the original then this process of making copies of DNA is known as?
Replication is the process in which n two identical copies of DNA molecules are produced which are exactly the same as the original
It is the most basic step occuring in living organisms.
The opening of the double helix and separation of the DNA strands, priming of the template strand, and construction of the new DNA segment are the three main phases in replication.
The DNA double helix's two strands uncoil at a specific spot known as the origin during separation. Then, a number of proteins and enzymes combine to prime the strands for duplication. Finally, the building of the new DNA strands is organized by a unique enzyme known as DNA polymerase.
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Calculate the number of moles in 2.4x10^46 molecules of Na ions
explain how you got your answer pls.
There would be 4 * 10^22 moles of the sodium ions.
What is the number of moles?We have to know that the number of moles of the ions can be obtained by the use of the formula for the Avogadro's number. From the Avogadro's number, we know that one mole of the substance is going to contain about 6.02 * 10^23 molecules of the sodium ions.
As such we have that;
If 1 mole can contain about 6.02 * 10^23 molecules of the sodium ions
x moles would contain 2.4x10^46 molecules of Na ions
x = 1 * 2.4x10^46/ 6.02 * 10^23
x = 4 * 10^22 moles
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These pea plants have been in the sunlight since early morning.
What can the pea plants do because they are in sunlight? What does this mean for the number of energy storage molecules in the pea plants?
Pea plants uses the light energy from sun for photosynthesis and they synthesis chemical energy in leaves.
What is photosynthesis ?Photosynthesis is a biochemical process taking place in green plants to synthesis energy with the aid of light energy. The green pigments chlorophyll absorbs enough light energy for this biochemical reactions.
The photosynthetic reaction is the reaction between water and carbon dioxide producing glucose and oxygen. Thus, this process intakes carbon dioxide that we exhale and release oxygen that aids our respiration.
Pea plants are green plants undergoing photosynthesis. They uses light energy to produce chemical energy. With the presence of sunlight, they can easily carry photosynthetic reaction in leaves.
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write the lewis structure for Ne. draw the particle by placing atoms on the grid and connecting them with bonds. include all lone pairs of electrons and nonbonding electrons
Lewis dot structure is used to represent the lone pairs of electrons and bonded pair of electrons in an atom or a molecule of an element.
The Lewis dot structure of an atom or molecule shows the valence shell electrons around the symbol of the element. The valence electrons are written in pairs and are written as dots. Neon belongs to the 18th group of the periodic table and thus is a noble gas. It has eight valence electrons. Lewis structures is also known as Lewis dot structures or electron dot structures are diagrams that represent the valence electrons of atoms within a molecule. The Lewis symbols and Lewis structures help visualize the valence electrons of atoms and molecules whether they exist as lone pairs or within bonds.
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A gas at 600 torr and 300 K is heated to a final volume of 1000 torr. What is the final temperature of the gas?
Answer:
500K
Explanation:
We use Charle's law that states that at a constant pressure the volume of a given mass of a gas varies linearly with absolute temperature of the gas.
V ∝ T
V = kT
∴ k is the proportionality constant
v/T = as it a ratio between volume and temperature the value of k would be a constant quantity.
Therefore it can be written as:
v1 / T1 = V2 / T2
Now solving the question:
V1 = 600 torr
T1 = 300 K
V2 = 1000 torr
T2 = ?
600/300 = 1000/T2
T2= (1000 x 300)/600
T2= 500 K
The formula for an ionic compound always indicates the _____ whole number ratio of positive to negative ions within the crystal.
The formula for ionic compound always indicate empirical formula. Empirical formula is the lowest number of the condition of the element present in a compound..
Why empirical formula is important?Empirical formula is formula represent the minimum condition of the reaction to happen between element. Empirical formula is commonly use to calculate the important value of a compound such as:
Molarity of the compoundMolality of the compoundMolecular formula of the compoundThe concentration of the compoundThe shift of the element present in the chemistry reactionThe number of negative ionThe number of positive ionLearn more about empirical formula here
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So I have a question in science I need a few paragraphs done and I just need this explained. How dose the internal structure and the external features of organisms enhance their survival
The internal structure and external features of organisms have evolved to enhance their survival in various ways.
What does the internal structure of the organisms mean?Internal structure refers to the internal organs and systems of an organism, such as the circulatory, respiratory, and nervous systems. These systems work together to maintain the organism's homeostasis, or internal balance, which is necessary for survival.
For example, the circulatory system transports oxygen and nutrients to cells, while the respiratory system removes carbon dioxide and other waste products.
What does the external structure of the organisms mean?External features, such as body shape, coloration, and behavior, also play a role in an organism's survival. For example, camouflage can help an organism avoid predators, while bright colors can signal to potential mates. The shape of an organism can also be important for survival.
Overall, they work together to enhance the organism's chances of survival by allowing it to find food, avoid predators, and reproduce successfully.
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Cyanides inhibit lactose permease by A. Competing with lactose for the binding site on permease B. Abolishing the lactose gradient between the inside and outside of the cell C. Abolishing the proton gradient between the inside and outside of the cell D. Blocking conformational changes of the transporter B A
Cyanides inhibit lactose permease by abolishing the proton gradient between the inside and outside of the cell
By interfering with the proton gradient across the cell membrane, cyanides prevent the lactose permease protein from transporting lactose across the membrane. Protons (H+) are pumped out of the cell by the proton-motive force, which results in a difference in proton concentration between the inside and outside of the cell and creates the proton gradient.
This proton gradient is used by lactose permease to propel lactose transport into the cell. The enzyme cytochrome oxidase, which is found in the mitochondria and is in charge of the last stage of the electron transport chain, binds to the iron atom in the active site. This binding prevents the enzyme from working, which inhibits proton pumping and causes the proton gradient to fall, both of which hinder lactose permease from working.
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How many mL of a 2.63 M solution do you need to dilute to 100 mL with a final concentration of 0.48
Answer is= 18.25/ How?
18.25 mL of a 2.63 M solution you need to dilute to 100 mL with a final solution concentration of 0.48.
The amount of a substance is often measured by how much it weighs – i.e. in g or mg or kg etc. The concentration is the amount divided by the volume it is dissolved in. concentration = amount divided by volume
Another way of representing the amount of a substance is to use the concept of mole. A mole is simply 6.0223 x 1023 molecules (this is “Avogadro’s number”)
Eggs come in dozens (12), molecules come in moles (6 x 1023) The mass of a mole of molecules is the formula weight in grams. This is sometimes called “molar mass” with symbol M. Sometimes it is referred to as molecular weight. Sometimes it is called “relative molecular mass” since the mass of a carbon element is designated to be 12 and other molecules or elements are given masses relative to that.
The molar mass of a small molecule such as an amino acid (eg glycine is NH2CH2COOH and has molecular mass = 75.07 g.mol-1) is much less than the molar mass of a protein (eg haemoglobin has molecular mass ~ 64500 g.mol-1).
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Next, the chemist measures the volume of the unknown liquid as 1870. cm³ and the mass of the unknown liquid as 1.17 kg.
Calculate the density of the liquid. Round
your answer to 3 significant digits.
Given the data above, is it possible to
identify the liquid?
If it is possible to identify the liquid, do so.
gmL
yes
no
dimethyl sulfoxide
pentane
carbon tetrachloride
glycerol
tetrahydrofuran
X
5.
Answer:
The density of any given liquid is equivalent to the mass of the liquiddivided by the volume of the liquid.From the given information, we have:The mass of the unknown liquid to be = 972 gThe volume of the unknown liquid to be = 0.610 L = 610 cm³If the formula for calculating Then;The Density of the unknown liquid ≅ 1.593 g/cm³In conclusion, the density of the unknown liquid is 1.593 g/cm³ to 3 significant figures.
Explanation:
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Classify each statement as true or false. Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help Period 3 elements have The valence electrons of group 5A The highest principal quantumThe valence electrons of group 2A six 2p electrons elements are in the 6s subshell. number of period 2 elements is 2. elements are in an s subshell. Period 4 elements have an completely full outer principal shells. inner electron configuration of [Ar]. number of period 3 elements is 4. Group 8A elements have The highest principal quantum Period 5 elements have an inner electron configuration of [Xe]. True False
The following are the true statements: Period 3 elements have The valence electrons of group 5A The highest principal quantum The valence electrons of group 2A six 2p electrons elements are in the 6s subshell. number of period 2 elements is 2
Valence electrons are placed in the outer most orbit of the atom and that orbit (shell) is called the valence shell. Let‟s take an example to identify them. Write the configuration of Oxygen 8O : 1s2 , 2s2 , 2p4
Oxygen has 6 electrons in its outer most orbit (2+4) that means it has 6 valence electrons and orbit 2 is called the valence shell. Now place these electrons in orbitals of their respective sub-shell.
Oxygen has 6 valence electrons and it needs 2 more electrons to achieve octet. The number of electrons needed to complete octet is termed as the valency of an element. This value can be obtained by subtracting the number of valence electrons from octet (8). So, the valency of Oxygen is 2. That means Oxygen is ready to share its 2 valence electrons or ready to accept 2 more electrons in order to achieve octet.
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Classify the compounds as acids, bases, or salts.
Acid
HF
NH4Cl
H2C204
H2SO3
Base
Ca(OH)2
NaF
RbOH
Salt
CaCl2
Answer: Jhon cena licked my
Explanation:
HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts, among all the given options.
Numerous acids and bases are found in nature on a regular basis, including citric acid in citrus fruits like oranges and lemons, tartaric acid and tamarind, malic acid the apples, lactic acid and milk and dairy products, and hydrochloric acid and gastric fluids. Similar to acids, several bases are present, including lime water. In our daily lives, we utilise several of these acids, like vinegar and acetic acid within the kitchen, lactic acid for washing clothes, baking soda for cooking, washing soda to cleaning, etc. HF, H[tex]_2[/tex]C[tex]_2[/tex]0[tex]_4[/tex] , H[tex]_2[/tex]SO[tex]_3[/tex] are acid. Ca(OH)[tex]_2[/tex], RbOH are base. NH[tex]_4[/tex]Cl, NaF, CaCl[tex]_2[/tex] are salts,
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Predict Considering the patterns you have identified, estimate the likely melting
points of cadmium (Cd), vanadium (V), and cobalt (Co). Enter your estimates in
the figure.
Give a handwritten explanation and response. Estimate the expected melting temperature of cadmium (Cd), vanadium, and other elements based on the patterns you have found.
What does melting point mean?
The temperature at which a pure substance's solid and liquid states can coexist in equilibrium is known as the melting point. A solid's temperature will rise when heat is added to it until its melting point is reached.
How do melting and boiling points differ?
The melting point
The temperature that a quality of output into a liquid under normal air pressure is known as the melting point. The temperature at which a liquid's vapor pressure equals the pressure around it, turning the liquid into vapor (and vice versa).
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Draw the lewis structure for resonance forms of acetamide (CH3CONH2)
The Lewis structure for acetamide is drawn by connecting the atoms with single bonds and assigning lone pairs of electrons to the non-bonding atoms.
The central carbon atom has four bonds and no lone pairs, while the oxygen atom has two bonds and two lone pairs. The two nitrogen atoms each have three bonds and one lone pair. The hydrogen atoms only have one bond each, as they only have one electron in their outer shell.
For the resonance forms of acetamide, the Lewis structure is drawn by connecting the atoms using double bonds instead of single bonds, while keeping the same number of lone pairs.
This forms a resonance hybrid between the two forms, where the electrons are delocalized. The central carbon atom has two double bonds and no lone pairs, while the oxygen atom has one double bond and two lone pairs. The two nitrogen atoms each have two double bonds and one lone pair. The hydrogen atoms also only have one bond each.
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Draw the Lewis structure for Ato3 and use it to answer the following questions:
a) Predict the approximate bond order between At and O:__
b) Predict the hybridization of the central atom:__
The approximate bonding order of At and O can be predicted using the Lewis structure of Ato3
How does Lewis structure rule work?Lewis structure, also known as electron-dot framework, is a physical formula in which dots serve as placeholders for electrons; two dots across two atoms signify a covalent link. Gilbert Newton Lewis, the man behind its 1916 introduction, gave it its name.
What is a Lewis structure read like?The Lewis structure of water, or H2O, is shown here as an example. The atom's core electrons are represented by each symbol, along with the nucleus. A hydrogen atom's nucleus is represented by each "H" in this diagram, and an oxygen atom's nucleus and two core electrons are represented by each "O". The valence electrons in the dots are not in bonds.
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C. If you were to measure out 0.0237 moles of potassium nitrate into a clear, dry cup. How
many grams are in this sample? Show your work in the space below.
Molar mass of KNO3:
The molar mass of potassium nitrate is 101 g. Thus the mass of 0.0237 moles of potassium nitrate is 2.39 grams.
What is molar mass ?The mass of one mole of a compound is called its molar mass. A compound containing 6.022 × 10²³ atoms is called one mole of the compound.
Mass of potassium = 39 g/mol
mass of nitrogen = 14 g/mol
mass of oxygen = 16 g/mol
mass of 3 O = 48 g
molar mass of KNO₃ = 48 + 39 + 14 = 101 g/mol
The mass of one mole of KNO₃ is 101 g. Then mass of 0.0237 mole is:
0.0237 × 101 = 2.39 g.
Therefore, the mass of 0.0237 moles of potassium nitrate is 2.39 g.
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Which items can be classified as matter? Check all that apply.
Answer:
a globe
snow rain clouds
The Coriolis effect is the deflection of moving objects from a straight path due to Earth's rotation. Which of the following is the result of the Coriolis effect?
The result of the Coriolis effect is the rotation of the earth on its axis. So the correct option is B.
What is the Coriolis effect?The Coriolis effect is a type of force to which the fluids of the earth are exposed. It is the acceleration they receive due to the rotation of the earth, what is generated is a deviation in their trajectory which now causes their trajectory to be curved. This force it is exposed to is called the coriolis force, but it is not a real force since there is nothing pushing on it.
The acceleration to which the fluids are exposed will be perpendicular to the axis of rotation of the earth and to the components of its velocity.
Therefore, we can confirm that the correct option is B. the rotation of the earth on its axis.
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The Coriolis effect is the result of which of the following?
A. winds spinning off the equator
B. the rotation of the earth on its axis
C. the different air movements north and south of the equator
D. the friction that slows down winds near the earth’s surface