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Molar Measurement
Test Description: A review of moles, molecular mass, Avogadro's number.
Instructions: Answer all questions to get your test result.
1) What is the atomic mass of lithium?
A
6.94 g/mol
B
75 g/mol
C
14.7 g/mol
D
3 g/mol
2) What is the molecular mass of CO2?
A
12 g/mol
B
44 g/mol
C
22 g/mol
D
400 g/mol
3) What is the molecular mass of sugar, C12H22O11
A
180 g/mol
B
426 g/mol
C
342 g/mol
D
167 g/mol
4) How many mols are 35 grams of potassium?
A
35 mol
B
0.75 mol
C
0.90 mol
D
1.1 mol
5) 626 grams of calcium carbonate is how many mols?
A
7.38 mol
B
6.26 mol
C
5.73 mol
D
3.27 mol
6) How many mols is 3.0 x 10^23 atoms of silver?
A
2.0 mol
B
0.48 mol
C
.33 mol
D
.75 mol
7) How many grams is 3.0 x 10^23 atoms of gold?
A
25 grams
B
95 grams
C
106 grams
D
197 grams
8) How many atoms of oxygen are in one formula unit of Al(C2H3O2)3?
A
3
B
2
C
5
D
6
9) What is the formula mass (molecular mass) of Al(C2H3O2)3?
A
158 g/mol
B
306 g/mol
C
122 g/mol
D
204 g/mol
10) What is the mass of 1 formula unit (molecule) of Pb(NO3)2?
A
5.5 x 10^-22 grams
B
5.5 x 10^-23 grams
C
1.2 x 10^-21 grams
D
331 g/mol
11) What is the formula mass (molecular mass) of barium chloride?
A
137 g/mol
B
207 g/mol
C
70 g/mol
D
172 g/mol
12) 308 grams of carbon dioxide would equal how many mols?
A
44 mols
B
8.0 mols
C
6.0 mols
D
7.0 mols
13) How many atoms are in 4.2 grams of zinc?
A
3.9 x 10^22 atoms
B
4.2 atoms
C
6.02 x 10^23 atoms
D
6.3 x 10^22 atoms
14) What mass would 7.1 x 10^24 molecules of CO2 weigh?
A
630 grams
B
12 grams
C
520 grams
D
44 grams
15) 44.8 Liters of CO2, measured at STP, would have what mass?
A
44 grams
B
88 grams
C
63.7 grams
D
22.4 grams
*select an answer for all questions
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