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Multiple Choice
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1

What is the molecular weight of P4O10 to 5 significant figures?
A)283.89
B)46.973
C)316.39
D)284.01
2

What is the molecular weight of (NH4)2S to 4 significant figures?
A)50.11
B)50.07
C)68.01
D)68.15
3

How many grams of biotin (C10H16N2O3S) are in 3 moles?
A)720.0
B)730.0
C)792.0
D)733.0
4

How many molecules are in 137g of the B vitamin Nicotinamide. (C6H6N2O)?
A)6.76 x 1023
B)6.81 x 1023
C)6.74 x 1023
D)6.77 x 1022
5

How many grams of glucose (C6H12O6) are consumed if 15.6 ml of water are produced? (density = 1.00 g/ml) C6H12O6 + 6O2 -> 6H2O + 6CO2
A)58.4
B)26.0
C)936
D)260
6

How many moles of mercury are in 1.93 ml? (density = 13.55 g/ml)
A)7.10 x 10-4
B)5.25 x 103
C)0.130
D)0.035
7

How many mL of ethanol (C2H6O) are present in 1.39 moles? (density = .785 g/ml)
A)81.6
B)50.3
C)42.2
D)75.2
8

How many kg of carbon dioxide are produced when 150 kg of glucose (C6H12O6) are fermented? C6H12O6 -> 2C2H5OH + 2CO2
A)18.3
B)73.3
C)37.9
D)36.6
9

How many molecules of nitrogen are produced when 35.6 g of NH3 react in the following equation? 4NH3 + 3O2 -> 2N2 + 6H2O
A)1.26 x 10 24
B)6.29 x 10 23
C)2.52 x 10 24
D)3.64 x 10 23
10

What is the mass in grams of 4.59 x 1022 molecules of water?
A)1.22
B)1.37
C)0.687
D)2.74
11

How many grams of water will be produced if sodium hydroxide reacts with phosphoric acid to give sodium phosphate and water when 18.15 g of NaOH are reacted with 14.35 g of H3PO4?
A)7.884g
B)8.177g
C)2.639g
D)24.53g
12

How many grams of excess reactant will remain if sodium hydroxide reacts with phosphoric acid to give sodium phosphate and water when 18.15 g of NaOH are reacted with 14.35 g of H3PO4?
A)2.657g
B)0.5785g
C)0.6383g
D)1.375g
13

In the following reaction, how many grams of excess reactant will remain if 7.53 g of NH3 and 11.4 g of Na are used? 2NH3 + 2Na -> 2NaNH2 + H2
A)3.49g
B)1.24 g
C)5.78 g
D)6.32 g
14

How many grams of Li2CO3 will be produced if 32.8 g of LiOH and 32.8 g of CO2 react in the following equation? 2LiOH + CO2 -> Li2CO3 + H2O
A)0.685g
B)0.202g
C)50.6g
D)1211g
15

How many grams of oxygen are consumed when 130.7 g of glucose (C6H12O6) burns in excess oxygen? C6H12O6 + 6O2 -> 6CO2 + 6H2O
A)23.21g
B)4.353g
C)139.3g
D)130.7g





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