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1 | |
What is the mass of one mole of acetylsalicylic acid (aspirin), C9H8O4?
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| | A) | 29 g
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| | B) | 108 g
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| | C) | 196 g
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| | D) | 180. g
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| | E) | none of the above
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2 | |
Determine the number of moles of aluminum in 2.154 x 10-1 kg of Al.
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| | A) | 5816 mol
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| | B) | 7.984 mol
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| | C) | 6.02 x 1023 mol
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| | D) | 4.801 mol
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| | E) | 8.783 mol
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3 | |
What is the number of oxygen atoms in 55.0 g of iron(II) hydroxide (Fe(OH)2 (molar mass
89.85 g/mol))?
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| | A) | 0.612
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| | B) | 1.22
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| | C) | 2.00
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| | D) | 3.69 x 1023 |
| | E) | 7.37 x 1023 |
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4 | |
How many grams of zinc are there in 22.7 g of ZnCl2?
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| | A) | 0.35 g
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| | B) | 0.17 g
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| | C) | 10.9 g
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| | D) | 1476 g
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| | E) | 0.32 g
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5 | |
A compound with a composition of 87.5 % N and 12.5 % H was recently discovered.
What is the empirical formula for this compound?
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| | A) | NH2 |
| | B) | N2H3 |
| | C) | NH
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| | D) | N2H2 |
| | E) | N2H
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6 | |
Combustion analysis of a hydrocarbon produces 0.396 g of CO2 and 0.163 g of H2O.
Which of the following molecular formulas is consistent with the analysis?
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| | A) | CH4 |
| | B) | C2H6 |
| | C) | C2H2 |
| | D) | C2H4 |
| | E) | C3H8 |
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7 | |
This equation is unbalanced: PCl3 + H2O → H3PO3 + HCl
When it is correctly balanced, the coefficients are, respectively
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| | A) | 1,3,1,1
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| | B) | 1,1,1,3
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| | C) | 1,3,1,3
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| | D) | 2,3,2,3
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| | E) | none of the above
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8 | |
Balance the following equation with the smallest set of whole numbers.
C4H10 + O2 → CO2 + H2O
What is the coefficient for CO2 in the balanced equation?
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| | A) | 1
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| | B) | 4
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| | C) | 6
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| | D) | 8
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| | E) | 12
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9 | |
The first step in the Ostwald process for making nitric acid is the formation of NO as follows:
4NH3 + 5O2 → 4NO + 6H2O
According to the equation, 5 moles of NH3 will react stoichiometrically with ________ moles of O2 to form _______ moles of NO.
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| | A) | 4, 5
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| | B) | 5, 4
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| | C) | 25, 20
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| | D) | 5/4, 4/5
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| | E) | 25/4, 5
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10 | |
Caustic soda, NaOH, can be prepared commercially by the reaction of Na2CO3 with slaked lime,
Ca(OH)2. How many grams of NaOH can be obtained by treating 1.350 kg of Na2CO3 with
Ca(OH)2?
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| | A) | 1788.8 g
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| | B) | 1019 g
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| | C) | 1.79 g
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| | D) | 509.4 g
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| | E) | 1.02 g
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11 | |
Given 6 mol of each reactant, which one would be limiting in the following reaction?
4Au + 8NaCN + O2 + 2H2O → 4NaAu(CN)2 + 4NaOH
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| | A) | Au
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| | B) | NaCN
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| | C) | O2 |
| | D) | H2O
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| | E) | There is no limiting reactant.
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12 | |
In the direct reaction of silicon with Cl2 the yield of SiCl4 is 50. %. How many grams of silicon must be reacted with excess chlorine in order to obtain 17 g SiCl4?
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| | A) | 1.4 g
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| | B) | 2.8 g
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| | C) | 5.6 g
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| | D) | 17 g
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| | E) | 28 g
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13 | |
What is the molarity of a solution that contains 3.00 moles of solute and 12.00 liters of solution?
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| | A) | 0.25 M |
| | B) | 3.00 M |
| | C) | 4.00 M |
| | D) | 12.00 M |
| | E) | Not enough information is given to answer the question.
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14 | |
What volume of concentrated nitric acid (15.0 M) is required to make 300 mL of a 2.5 M nitric acid solution?
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| | A) | 1.8 L
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| | B) | 50 mL
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| | C) | 12.5 mL
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| | D) | 18 mL
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| | E) | 8 mL
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15 | |
Sodium phosphate (Na3PO4) reacts with HCl to form H3PO4 and NaCl. Use a balanced equation to determine how many liters of 0.1 M HCl are required to react with 0.1 mole of sodium phosphate.
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| | A) | 0.03 L
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| | B) | 0.3 L
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| | C) | 0.6 L
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| | D) | 1 L
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| | E) | 3 L
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