WorksheetsMolar Mass & Gram to Mole Conversions
Total questions: 33
Worksheet time: 2hrs 0mins
Name
Class
Date
1.
The molar mass of an element is equal to its...
a)
Atomic mass
b)
Atomic number
c)
Oxidation number
d)
Valence electrons
2.
The mass of one mole of substance is called...
a)
molecular mass
b)
mole constant
c)
molar mass
d)
atomic weight
3.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
4.
What are the units for molar mass?
a)
g
b)
amu
c)
g/mol
d)
L
5.
What is the molar mass of NaOH?
a)
40 g/mol
b)
38.989 g/mol
c)
23.998 g/mol
d)
57.004 g/mol
6.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
7.
What is the molar mass of sodium?
a)
11
b)
23
c)
45.98
d)
3
8.
What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?
a)
62.435g
b)
116.399g
c)
133.341g
d)
97.888g
9.
What is the molar mass of B2(CO3)3?
a)
81.632 g/mol
b)
94.842 g/mol
c)
38.822 g/mol
d)
201.648 g/mol
10.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
11.
How many molecules are in 9.4 moles of AlCl3?
a)
5.66
b)
5.66x1024
c)
0.705
d)
1.25x1023
12.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
13.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
14.
How many atoms are in a 3.56 g sample of Cu?
a)
3.37 x 1022 Cu atoms
b)
6.02 x 1023 Cu atoms
c)
0.056 Cu atoms
d)
1 Cu atom
15.
One mole of sulfur is equal to home many atoms?
a)
32
b)
16
c)
1.2 x 10^23
d)
6.02 x 10^23
16.
14.5 grams of gallium (Ga) is equal to how many moles?
[1 mole Ga = 70g Ga]
[1 mole Ga = 70g Ga]
a)
4.81
b)
3.22
c)
0.207
d)
0.655
17.
What is the mass of 9.4 moles of B2(Cr2O7)3?
[1 mole B2(Cr2O7)3 = 670g B2(Cr2O7)3]
[1 mole B2(Cr2O7)3 = 670g B2(Cr2O7)3]
a)
6.41 x 1022g
b)
5.67x1024 g
c)
62.98g
d)
6298 g
18.
36.0 g of Be contains how many moles?
[1 mole Be = 9g Be]
[1 mole Be = 9g Be]
a)
0.25 mol
b)
4.0 mol
c)
45 mol
d)
320 mol
19.
What is the molar mass of Al2(SO4)3?
a)
75 g
b)
342 g
c)
79 g
d)
27 g
20.
0.75 mole of copper is equal to how many atoms?
a)
8.03 x 10^23
b)
6.02 x 10^23
c)
4.51^x 10^23
d)
3.11 x 10^23
21.
Fluorine is diatomic. What is the molar mass of fluorine gas?
a)
18.998 g/mol
b)
37.996 g/mol
c)
9 g/mol
d)
18 g/mol
22.
What is the molar mass of Zn(C2H3O2)2
a)
392.8g/mol
b)
142.9g/mol
c)
361g/mol
d)
183.5 g/mol
23.
What is the molar mass of Fe3(PO4)2
a)
823.8g/mol
b)
357.5 g/mol
c)
455.6g/mol
d)
86.3g/mol
24.
What is the numerical value of Avogadro's number?
a)
60.22x1023
b)
6.022x1023
c)
6.022x1032
d)
6.022x1024
25.
A mole of Neon contains
6.02 x 1023 _____.
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
26.
A scientist shows you a 2.25-mol sample of carbon and a 2.25-mol sample of selenium. Which of the following is true?
a)
they have the same mass
b)
they have the same volume
c)
they have the name number of atoms
d)
they have the same density
27.
If your lab partner tells you they have a 1.5-mole sample of aluminum, what does that tell you?
a)
the purity of the sample
b)
the number of atoms in the sample
c)
the volume of the sample
d)
the temperature of the sample
28.
Which of the following is true about a mole of iron and a mole of zinc?
a)
they have the same mass
b)
the iron sample has more mass
c)
the zinc sample has more mass
29.
How many moles are in 5.674 grams of Li2CO3?
a)
3.762 moles
b)
1.234 moles
c)
0.07679 moles
d)
0.04682 moles
30.
How many moles are in a 5.387 gram sample of Al2(SO4)3?
a)
0.02387 moles
b)
0.01574 moles
c)
0.06842 moles
d)
0.01489 moles
31.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
32.
Which of the following would have the highest number of moles?
a)
4g CO2
b)
15g H2O
c)
22g NaCl
d)
100g AgCl
33.
Which of the following would have the highest mass?
a)
0.75 mol Co3(PO4)2
b)
12 mol CH4
c)
16.2 mol chlorine gas
d)
1.2 mol IrI3
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