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