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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 12b
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:
d.
문제 38b
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 70a
Classify each of the following as exothermic or endothermic:
b. In the body, the synthesis of proteins requires energy.
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? 2SO2(g) + O2(g) → 2SO3(g)
a. adding more 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 83
Balance each of the following by adding coefficients, and identify the type of reaction for each:
a.
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.
문제 85c
If red spheres represent oxygen atoms, blue spheres represent nitrogen atoms, and all the molecules are gases,
c. indicate the type of reaction as combination, decomposition, single replacement, double replacement, or combustion.
문제 86a
If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,
a. write the formula for each of the reactants and products.
문제 86b
If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases,
b. write a balanced equation for the reaction.
