give the systematic name for the following compound

Answer:

D

Explanation:

H2O + H20 = H30+ + OH-

Answer:

Deoxyribose Nucleic Acid

Answer:

The Full form of DNA is Deoxyribonucleic acid. Deoxy means lack of an oxygen atom, Ribo means ribose sugar, Nucleic is found in the nucleus of cell and Acid contains negatively charged phosphate ion which is acidic.

Answer:

There are approximately [tex]0.271\; \rm mol[/tex] of formula units in that [tex]\rm 15.2\; g[/tex] of [tex]\rm KOH[/tex] (the solute of this solution.)

Explanation:

A solution includes two substances: the solute and the solvent. Note the solution here contains significantly more water than [tex]\rm KOH[/tex]. Hence, assume that water is the solvent (as it is in many other solutions.)

The (molar) formula mass of [tex]\rm KOH[/tex] is necessary for finding the number of moles of

The formula mass of [tex]\rm KOH[/tex] will thus be the sum of:

On the other hand, the mass (in grams) of one mole of atoms of an element is (numerically) the same as its relative atomic mass. The relative atomic mass data can be found on most modern periodic tables.

Relative atomic mass data from a modern periodic table:

For example, the relative atomic mass of [tex]\rm K[/tex] (potassium, atomic number [tex]19[/tex]) is [tex]39.098[/tex] (3 sig. fig.) Hence, the mass of one mole of

The formula mass of [tex]\rm KOH[/tex] is the sum of these three masses:

[tex]\begin{aligned}& M(\mathrm{KOH}) \\ &\approx 39.098 + 15.999 + 1.008 \\ &= 56.105\; \rm g \cdot mol^{-1}\end{aligned}[/tex].

The number of moles of [tex]\rm KOH[/tex] formula units in this [tex]15.2\; \rm g[/tex] sample would be:

[tex]\begin{aligned}n &= \frac{m(\mathrm{KOH})}{M(\mathrm{KOH})} \\ &\approx \frac{15.2\; \rm g}{56.105\; \rm g \cdot mol^{-1}} \approx 0.271\; \rm mol \end{aligned}[/tex].

Answer:

the answer is 0.271

Explanation:

got the right answer on edg 2020

Answer:

Explanation:

Alkali metals   ------ outermost orbit containing one electron

ns²np¹

Alkaline metals -------- outermost orbit containing two electron

ns²np²

halogens --------------- outermost orbit containing seven electron

ns²np⁵

noble gas --------------- outermost orbit containing eight electron

ns²np⁶.

Answer:

2

Explanation:

Heat of reaction is usually the difference of heat of products and heat of reactions. The difference here is represented by the letter 2.

The potential energy diagram has been representing the heat of reaction at interval 2.

The heat of reaction has been defined as the difference in the heat of product and reactant. The potential energy has been the stored energy of the compounds.

In the given potential energy curve, the heat of reaction has been found to be the increase in potential energy. There has been an increment in the energy at interval 2.

Thus, the potential energy diagram has been representing the heat of reaction at interval 2.

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Answer:

Static Friction

Explanation:

Answer:

The answer is Static Friction

Explanation:

Answer:

pH = 0.18

Explanation:

The sulfuric acid (H₂SO₄) has the following reactions in aqueous medium:

H₂SO₄ → HSO₄⁻ + H⁺

HSO₄⁻ ⇄ SO₄²⁻ + H⁺ Ka = 1.1x10⁻²

Where Ka is defined as Ka = [SO₄²⁻] [H⁺] / [HSO₄⁻] = 1.1x10⁻²

Based in the first reaction, [H⁺] = 0.65M and [HSO₄⁻] = 0.65M

In the second reaction, the two species are in equilibrium, thus, concentrations will be:

[H⁺] = 0.65M + X

[HSO₄⁻] = 0.65M - X

[SO₄²⁻] = X

Replacing in Ka formula:

1.1x10⁻² = [X] [0.65 + X] / [0.65M - X]

7.15x10⁻³ - 1.1x10⁻²X = 0.65X + X²

0 = X² + 0.661X - 7.15x10⁻³

Solving for X:

X = -0.67M → False solution. There is no negative concentrations.

X = 0.01065M → Right answer.

Thus [H⁺] = 0.65M + 0.01065M = 0.66065M

As pH = -log [H⁺];

pH = -log 0.66065M = 0.18

Answer:

40.0 L

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

Answer:

60 moles of NaF

Explanation:

The balanced equation for the reaction is given below:

Al(NO3)3 + 3NaF —> 3NaNO3 + AlF3

From the balanced equation above,

3 moles of NaF reacted to produce 1 mole of AlF3.

Therefore, Xmol of NaF will react to produce 20 moles of AlF3 i.e

Xmol of NaF = 3 x 20

Xmol of NaF = 60 moles

Therefore, 60 moles of NaF are required to produce 20 moles of AlF3.

Answer: Both biotic and abiotic limiting factors can limit organisms' ability to live or reproduce.

Explanation:

penn foster

Answer:

Metamorphic rock

Explanation:

Answer:

metamorphic

Explanation:

just took the test

Answer:

a. Manganese(IV) oxide

b. Mercury(I) chloride

c.  Iron(III) nitrate

d. Titanium(IV) chloride

e. Copper(II) bromide

Explanation:

The IUPAC nomenclature is regulated by International Union of Pure and Applied Chemistry which is used in organic chemistry for naming of the organic chemical compounds.

a. Manganese(IV) oxide is IUPAC name of manganesse dioxed . It is an inorganic compound having the formula MnO2.

b. Mercury(I) chloride is IUPAC name of mercurous chloride . It is also known as the mineral calomel and have a chemical formula Hg2Cl2.

c. Iron(III) nitrate is IUPAC name of ferric nitrate . It have a chemical formula Fe(NO₃)₃.

d. Titanium(IV) chloride is IUPAC name of titanium tetrachloride - .  It have a chemical formula TiCl4.

e. Copper(II) bromide is IUPAC name of cupric bromide with chemical formula CuBr2 or Br2Cu.

Answer:

I believe its B

Explanation:

Answer:

B. Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L.

Answer:

[tex]S^0 \rightarrow S^{+4}+4e^-[/tex]

Explanation:

Hello,

In this case, for the reaction:

[tex]K_2Cr_2O_7 + H_2O + S \rightarrow SO_2 + KOH + Cr_2O_3[/tex]

We first must assign the oxidation state of each element:

[tex]K^{+1}_2Cr^{+6}_2O_7^{+2} + H_2^{+1}O^{-2} + S^0 \rightarrow S^{+4}O_2^{-2} + K^{+1}O^{-2}H^{+1} + Cr_2^{+3}O_3^{-2}[/tex]

Thus, we should remember that the oxidation half-reaction applies for the element undergoing an increase in its oxidation state, such case is sulfur, for which passes from 0 to +4 as shown below:

[tex]S^0 \rightarrow S^{+4}+4e^-[/tex]

It means, that four electrons were lost due to the effect of the strong oxidizing agent, potassium dichromate.

Best regards.

Answer:

iv. -NH₂

Explanation:

The amine group is an activating substituent and provides an ortho-para orientation.

The free electrons in the nitrogen atom provide stabilization by resonance in the sigma complex if the attack by the electrophilic reactant occurs in the positions ortho or para with regards to the nitrogen atom.

Answer:

A small amount of solute dissolved in a larger amount of solvent.

Take this analogy to help you understand, if you were to put a teaspoon of sugar in a liter of water it would dissolve, but if you put a sack of sugar in it it would not dissolve! The solute is what is being dissolved and the solvent is what dissolves the solute, so that eliminates some of the options.

Answer: 1.87 atm

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]

where,

[tex]P_1[/tex] = initial pressure of gas = 2.50 atm

[tex]P_2[/tex] = final pressure of gas = ?

[tex]V_1[/tex] = initial volume of gas = 26.4 ml

[tex]V_2[/tex] = final volume of gas = 36.2 ml

[tex]T_1[/tex] = initial temperature of gas = [tex]2.5^oC=273+2.5=275.5K[/tex]

[tex]T_2[/tex] = final temperature of gas = [tex]10^oC=273+10=283K[/tex]

Now put all the given values in the above equation, we get:

[tex]\frac{2.50\times 26.4}{275.5}=\frac{P_2\times 36.2}{283}[/tex]

[tex]P_2=1.87atm[/tex]

The new pressure is 1.87 atm by using combined gas law.

Answer:The answer is C melting.

Explanation:

Answer:melting

Explanation:

Answer:

Answer if yourself Kempner student.

Explanation:

xD

Answer:

Volume of flask = 29.134 cm³

Explanation:

Mass of water = mass of filled stoppered flask - mass of empty stoppered flask.

Mass of water = 65.858 - 36.724 = 29.134 g

Density of water = 1 g/cm³

Volume = mass/ density

Volumeof water = 29.134 g/ 1g/cm³ = 29.134cm³

Therefore, volume of flask = 29.134 cm³

Answer:

The volume of the flask is 103.6 g

Explanation:

We know that density is equals to mass per unit volume. So for finding the volume, we have to put the values of masses of water and flask and density of water in the formula.

First the masses of both water and flask is added which is 102.6 g and the density of water is 0.997 g/cm3. So by puting these values in the formula of volume i. e. volume = mass/ density, so we get 103.6 cm3 volume.

Answer:

3.Medical Scientists

5.Biochemists and Biophysicists

Explanation:

Science and Math jobs are expected to have much faster than average growth. Medical Scientists and Biochemists and Biophysicists is correct.

Scientists with biochemistry training are known as biochemists. They research the chemistry of living things, including chemical reactions and changes. Biochemists research DNA, proteins, and cellular components. A portmanteau of "biological chemist" is the term "biochemist."

The study of biochemistry focuses on the chemistry of living things. It is a lab-based science that combines chemistry and biology.

Biochemists investigate the makeup, chemistry, and chemical processes of the compounds found in living things in order to understand how they work and how to manipulate them.

Thus, option 3 and 5 both are correct.

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Enthalpy is the heat involved in a reaction.

The enthalpy change is the sum of the internal energy and the product of volume and pressure. Enthalpy is the heat involved in a reaction. The correct option is A.

The enthalpy denotes the measurement of energy in a thermodynamic system. The amount of enthalpy equals to the total heat content of a system, equivalent to the system's internal energy plus the product of volume and pressure.

The enthalpy is described as a state function, which indicates that its value depends only on the state of the system and it is independent of the path by which this state has been reached.

The equation of the enthalpy of system is given as:

H = U + PV

Here the enthalpy is represented by the letter 'H'. It is a very important quantity as it gives how much heat or energy is present in the system.

Thus the correct option is A.

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Answer:

THE TRUE STATEMENTS REGARDING REACTION RATE IS "INCREASING TEMPERATURE OR ADDING A CATALYST WILL INCREASE THE REACTION RATE".

Explanation:

The rate of a chemical reaction is the number of moles of reactant converted or product formed per unit time. There are various factors that affect reaction rate and they include;

1. Nature of the reactant

2. concentration and pressure of reactants. pressure is for gases.

3. temperature of the reactants.

4. surface areas of the reactants

5. presence of light

6. presence of catalyst.

I will talk about the role of temperature and catalyst in reaction rate.

TEMPERATURE:

The rate of virtually all reactions (chemical) increase when the temperature is increased. increasing the temperature of a system both exothermic and endothermic reactions, energy in the form of heat is supplied to the system which thus increases the number of particles with energies equal to or more than the activation energy of the system. This increase in particles leads to increase in collision and thus the reaction proceed faster.

CATALYST

A catalyst is a substance which alters the rate of a chemical reaction but remains unchanged at the end of the reaction. Catalyst operates by providing an alternative route for the reaction to occur. So adding a catalyst and has a lower activation energy when added increases the rate of reaction as more particles can collide with each other. This kind of catalyst is called positive catalyst. A catalyst that provides an alternative route with a higher activation energy is called negative catalyst.

Answer: Solar energy

Explanation:

Solar energy because it has more clear and sunny skys

Hello there!

An alternative energy source that is best for Coalville is wind energy.

The first two options, solar power and hydroelectric power aren't very good options since solar power requires lots of sun and they only receive 70 days of sun. While, hydroelectric power isn't a good choice either since it is a small stream meaning very little water and not big enough to build a dam on.

Therefore, wind energy is the best idea since high wind speeds are good to spin the wind turbines. The faster the wind the more energy is produced. Coalville has an average windspeed of 20 mph which is quite fast so that will the best option.

Answer:

D & E

Explanation:

I think this is dealing with latent heat and D & E would be the range where you will find solid and liquid phases in equilibrium, cuz it starts as gas at from A to B, B to C is gas and liquid equilibrium, C to D is liquid, D to E solid and liquid, and then E to F is solid.

Uniform cooling of a pure substance sample that began as a gas. Between points D and E, solid and liquid phases can coexist.

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Answer:

Unsweetened tea

Explanation:

A concentrated solution is a solution that has more of the solute in it than the solvent (water).

A diluted solution is a solution that has more solvent (water) than the solute.

From the above we can say that the sweet tea contains more of the tea than water i.e it is concentrated hence, the taste is sweet. On the other hand, we can say that the unsweetened tea contains more water than the tea i.e it is diluted hence, the unsweetened taste.

Answer:

172 g

Explanation:

Let's consider the reduction of Au³⁺ to Au.

Au³⁺(aq) + 3 e⁻ → Au(s)

In order to find the mass of gold produced, we will use the following relations.

The mass of gold produced when 15.1 A of current are passed through a gold solution for 31.0 min is:

[tex]31.0min \times \frac{60s}{1min} \times \frac{15.1C}{s} \times \frac{1mole^{-} }{96,468C} \times \frac{3molAu}{1mole^{-} } \times \frac{196.97gAu}{1molAu} = 172 gAu[/tex]

Answer:

Option B, [tex]H3PO4 + H2O <==> H3O^+ + H2PO4^-[/tex]

Explanation:

In this reaction, a weak acid is reacting with  water. Thus, water is this case will act as a proton acceptor or a base as well as an acid. Hence water will be amphiprotic for this chemical process and can donate as well accept as a proton. Now when weak acid such as phosphoric acid loses a hydrogen ion it forms a weak conjugate base ie. H2PO4^-. Water being a weak base shall accept the proton and forms hydronium ion i.e H3O^+

The dihydrogen phosphate ion reacts with water:

H2PO4^- + H2O <----> HPO4^2- + H3O^+

After some time a proton is again transferred to the H2O molecule to produce  phosphate ion

HPO4^2- + H2O <----> H3O^+ + PO4^3-