Which compounds are classified as electrolytes? (1) KNO3 and H2SO4 (3) CH3OCH3 and H2SO4 (2) KNO3 and CH3OH (4) CH3OCH3 and CH3OH

Answers

Answer 1

Answer: KNO₃ and H₂SO₄ are classified as electrolytes since they dissociate in water. KNO₃ in water goes to K₊ and NO₃⁻. H₂SO₄ in water can be thought of as going to 2H⁺ and SO₄²⁻ but later on you will learn that when placed into water, H₂SO₄ actually forms H₊, HSO₄⁻, and SO₄²⁻ since HSO₄⁻ is a weak acid and won't dissociate completely.
I hope this helps and if anything is unclear feel free to ask about it in the comments.

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How will the vapor pressure of an aqueous solution of sodium chloride compare to that of pure water?

Answers

The vapor pressure of a compound refers to the pressure generated by the vapour of a compound in equilibrium with its condensed stage. The major determinant of a compound vapour pressure is temperature. The vapour pressure of an aqueous solution of sodium chloride will be lower than that of pure water. This is because, dissolution of solute in a solvent always reduces the vapour pressure of the solution as a result of interactions between the molecule of the solute and the solvent. Thus, a pure compound will always have a higher vapour pressure than a solution.

The solutions vapor pressure would be lower.

An object of mass 1 kg contains 4 × 10²⁰ atoms. If one electron is removed for every atom of solid, the charge gained by solid in 1g is :

Answers

Explanation:

To find the charge gained by the solid when one electron is removed from each of its atoms, you can follow these steps:

1. Calculate the total number of electrons in 1 gram of the solid. Since there are 4 × 10^20 atoms in 1 kg, there are (4 × 10^20 / 1000) atoms in 1 gram.

2. Multiply the number of atoms in 1 gram by the charge gained by removing one electron. Each electron has a charge of approximately -1.6 × 10^-19 coulombs.

3. The total charge gained by the solid in 1 gram is the result of the multiplication from step 2.

Let's calculate it step by step:

Number of atoms in 1 gram = (4 × 10^20 / 1000) = 4 × 10^17 atoms

Charge gained by removing one electron from an atom = -1.6 × 10^-19 C

Total charge gained by the solid in 1 gram = (4 × 10^17) × (-1.6 × 10^-19) C

Now, calculate this expression to find the charge gained by the solid in 1 gram.

Final answer:

The charge gained by a solid when one electron is removed from each atom can be calculated by multiplying the charge of one electron by the number of atoms in the solid.

Explanation:

The question asks for the charge gained by a solid when one electron is removed from each atom of the solid. The charge gained by one atom can be calculated by multiplying the charge of one electron (1.602 × 10-19 C) by the number of atoms in one gram of the solid (4 × 1020 atoms/g). To find the total charge gained by the solid in 1g, we can multiply the charge gained by one atom by the number of atoms in 1g of the solid (1 mole = 6.02 × 1023 atoms).

Charge gained by one atom = 1.602 × 10-19 C

Number of atoms in 1g = 4 × 1020 atoms/g

Total charge gained by 1g of solid = Charge gained by one atom × Number of atoms in 1g

Learn more about Charge gained by solid when electrons are removed here:

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Why does a high temperature have to be used to weld pieces of metal together

Answers

because of the metling point of metals, it is difficult to just simply put metal together and have them to stay together without any type of glue or epoxy based creams.

wielding is used to melt the surface or even change the compound completely so they are able to combine with other metals.

same thing with atoms, you need a lot of heat, and speed to simply make salt or even copper because of the elements not really being favorable of each other.

Which reaction does not occur?2HF(aq) + Cl2(g) → F2(g) + 2HCl(aq)
2Na(s) + ZnF2(aq) + 2NaF(aq) + Zn(s)
O Fe(s) + CuCl2(aq) → FeCl2(aq) + Cu(s)
0 2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)

Answers

Answer: $2HF(aq)+Cl_2(g)\rightarrow F_2(g)+2HCl(aq)$ will not occur.

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

A general single displacement reaction can be represented as :

$X+YZ\rightarrow XZ+Y$

a) $2HF(aq)+Cl_2(g)\rightarrow F_2(g)+2HCl(aq)$

Flourine is more reactive than chlorine and hence this reaction cannot occur.

b) $2Na(s)+ZnF_2(aq)\rightarrow 2NaF(aq)+Zn(s)$

Sodium is more reactive than zinc and hence the reaction will occur.

c) $Fe(s)+CuCl_2(aq)\rightarrow FeCl_2(aq)+Cu(s)$

Iron is more reactive than copper and hence the reaction will occur.

d) $2HCl(aq)+Mg(s)\rightarrow MgCl_2(aq)+H_2(g)$

Magnesium is more reactive than hydrogen and hence the reaction will occur.

How far can a cough travel?

Answers

Traveling upwards of 200 mph or 320 km/h, and accelerating in a matter of seconds, germs from a cough or sneeze can travel a great distance very quickly.

Identify the following as a compound or a mixture: quartz (SiO2)

Answers

quartz (SiO2) is a compound. A compud is the combination of two or more elements. It is a compound because three elements are formed, the silicon and the two atoms of oxygen.

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