Name: Chemistry: An Introduction to General, Organic, and Biological Chemistry
Author: Timberlake
ISBN: 9780134421353

Ch.7 Chemical Quantities and Reactions

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Timberlake 13th Edition

Ch.7 Chemical Quantities and Reactions

문제 1

What is a mole?

문제 2

What is Avogadro's number?

문제 11b

Calculate the molar mass for each of the following:

b. C₃H₆O₃

문제 12c

Calculate the molar mass for each of the following:

c. Fe(ClO₄)₃

문제 17a

Calculate the molar mass for each of the following:

a. Al₂(SO₄)₃, antiperspirant

문제 22d

Calculate the mass, in grams, for each of the following:

d. 0.145 mole of C₂H₆O

문제 22e

Calculate the mass, in grams, for each of the following:

e. 2.08 moles of (NH₄)₂SO₄

문제 35d

Determine whether each of the following chemical equations is balanced or not balanced:

문제 38c

Balance each of the following chemical equations:

c. Sb₂S₃(s) + HCl(aq) → SbCl₃(aq) + H₂S(g)

문제 39d

Balance each of the following chemical equations:

d. Al(s) + HCl(aq) → H₂(g) + AlCl₃(aq)

문제 45c

Identify each of the following as an oxidation or a reduction:

c. Cr³⁺(aq) + 3e^– → Cr(s)

문제 49a

In the mitochondria of human cells, energy is provided by the oxidation and reduction reactions of the iron ions in the cytochromes in electron transport. Identify each of the following as an oxidation or a reduction:

a. Fe³⁺ + e^– → Fe²⁺

문제 55c

The chemical reaction of hydrogen with oxygen produces water.

2 H₂(g) + O₂(g) → 2 H₂O(g)

c. How many moles of H₂O form when 2.5 moles of O₂ reacts?

문제 67a

Why do chemical reactions require energy of activation?

문제 67c

Draw an energy diagram for an exothermic reaction.

문제 68a

What is measured by the heat of reaction?

문제 69b

Classify each of the following as exothermic or endothermic:

b. The energy level of the products is higher than that of the reactants.

문제 69c

Classify each of the following as exothermic or endothermic:

c. The metabolism of glucose in the body provides energy.

문제 70b

Classify each of the following as exothermic or endothermic:

b. In the body, the synthesis of proteins requires energy.

문제 71a

Classify each of the following as exothermic or endothermic:

a. CH₄(g) + 2O₂(g) $\xrightarrow{∆}$ CO₂(g) + 2H₂O(g) + 802kJ

문제 73a

What is meant by the rate of a reaction?

문제 75a

How would each of the following change the rate of the reaction shown here?

2 SO₂(g) + O₂(g) → 2 SO₃(g)

a. adding some SO₂(g)

문제 76c

How would each of the following change the rate of the reaction shown here?

2 NO(g) + 2 H₂(g) → N₂(g) + 2 H₂O(g)

c. removing some H₂(g)

문제 79c

Using the models of the molecules (black = C, white = H, yellow = S, green = Cl), determine each of the following for models of compounds 1 and 2:

d. number of moles in 10.0 g

문제 80c

Using the models of the molecules (black = C, white = H, yellow = S, red = O), determine each of the following for models of compounds 1 and 2:

c. number of moles in 10.0 g

문제 82d

Ibuprofen, an anti-inflammatory drug in Advil, has the formula C₁₃H₁₈O₂.

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d. How many moles of ibuprofen contain 1.22 × 10²³ atoms of C?

문제 83a

Balance each of the following by adding coefficients, and identify the type of reaction for each:

문제 83b

Balance each of the following by adding coefficients, and identify the type of reaction for each:

문제 85a

If red spheres represent oxygen atoms, blue spheres represent nitrogen atoms, and all the molecules are gases,

a. write the formula for each of the reactants and products.

문제 85b

If red spheres represent oxygen atoms, blue spheres represent nitrogen atoms, and all the molecules are gases,

b. write a balanced equation for the reaction.