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2 years ago

Which of the follow statements is true?

Chemistry

1 answer:

goldfiish [28.3K]2 years ago

4 0

Answer:

The true statement is a. Reductants reduce oxidants and become oxidized.

Explanation:

The principle characteristic of reductant is to donate electron and that donated electron is accepted by an oxidant.

As a result reductant become oxidized by reducing the oxidant which itself get reduced by accepting the electron from the reductant.

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Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products.

Alex_Xolod [135]

Answer:

$Keq=\frac{[HCO_3^-][OH^-]}{[CO_3^{2-}]}$

$Keq=[O_2]^3$

$Keq=\frac{[H_3O^+][F^-]}{[HF]}$

$Keq=\frac{[NH_4^+][OH^-]}{[NH_3]}$

Explanation:

Hello there!

In this case, for the attached reactions, it turns out possible for us to write the equilibrium expressions by knowing any liquid or solid would be not-included in the equilibrium expression as shown below, with the general form products/reactants:

$Keq=\frac{[HCO_3^-][OH^-]}{[CO_3^{2-}]}$

$Keq=[O_2]^3$

$Keq=\frac{[H_3O^+][F^-]}{[HF]}$

$Keq=\frac{[NH_4^+][OH^-]}{[NH_3]}$

Regards!

5 0

2 years ago

A compound contains only carbon, hydrogen, and oxygen. Combustion of 139.1 g of the compound yields 208.6 g of CO2 and 56.93 g o

Fofino [41]

Answer:

1. Mass of Carbon is 56.89g

2. Mass of Hydrogen is 6.33g

3. Mass of Oxygen is 75.88

Explanation:

The following were obtained from the question.

Mass of the compound = 139.1g

Mass of CO2 produced = 208.6g

Mass of H2O produced = 56.93

1. Determination of mass of Carbon (C). This is illustrated below:

Molar Mass of CO2 = 12 + (2x16) = 44g/mol

Mass of C = 12/44 x 208.6

Mass of C = 56.89g

2. Determination of the mass of Hydrogen (H). This is illustrated below:

Molar Mass of H2O = (2x1) + 16 = 18g/mol

Mass of H = 2/18 x 56.93

Mass of H = 6.33g

3. Determination of the mass of oxygen (O).

This is illustrated below:

Mass of the compound = 139.1g

Mass of C = 56.89g

Mass of H = 6.33g

Mass of O = Mass of compound - (mass of C + Mass of H)

Mass of O = 139.1 - (56.89 + 6.33)

Mass of O = 139.1 - 63.22

Mass of O = 75.88

3 0

2 years ago

Which of the following best illustrates a natural process acting as a constructive force

Alina [70]

Answer:

Wind depositing sand to build up sand dunes.

Explanation:

3 0

2 years ago

Dalton’s theory states that atoms are the smallest possible parts of elements. In a chemical reaction, atoms will rearrange and

USPshnik [31]

Answer:

Atoms will rearrange and for new substances

Explanation:

In a chemical reaction, elements combine their atoms and create new substances. For this to occur, the bonds must break and form new ones with the other atoms.

4 0

3 years ago

Read 2 more answers

Classify each of the following substances as an element or a compound: (a) hydrogen, (b) water, (c) gold, (d) sugar.

cricket20 [7]

Answer:

a) element

b) compound

c) element

d) compound

Explanation:

a) Hydrogen is the chemical element with the symbol H; is the lightest element in the periodic table.

b) Water: It is a substance whose molecule is composed of two atoms of hydrogen and one of oxygen.

⇒ molecular formula: H2O

c) gold: is the chemical element with the symbol Au. It is a very dense, soft and intense yellow metal.

d) sugar: it is a compound whose chemical formula is C12H22O11

5 0

2 years ago