WorksheetsUnit 3 Test Review
Total questions: 25
Worksheet time: 2hrs 35mins
The molar mass of Ca(SO3)2 is 200.22 grams/mole. If a sample has a mass of 50.055 grams, then how many moles and molecules does the sample contain?
4 moles; 2.408 x 1024 molecules
1 mole; 6.02 x 1023 molecules
0.25 moles; 1.505 x 1023 molecules
0.5 moles; 3.01 x 1023 molecules
Which of the following samples has the greatest number of atoms?
4.505 g of beryllium (Be, 9.01 g/mol)
50.1475 g of mercury (Hg, 200.59 g/mol)
10.02 g of calcium (Ca, 40.08 g/mol)
4.67 g of nitrogen (N, 14.01 g/mol)
The molar mass of NaOH is 40 g/mol. What is the mass of 2 moles of NaOH?
20 g
40 g
80 g
60 g
97.24 grams of magnesium (24.31 g/mol) contains the same number of atoms as
32 g of oxygen (O, 16 g/mol)
25.2675 g of ruthenium (Ru, 101.07 g/mol)
339.2 g of krypton (Kr, 84.80 g/mol)
89.92 g of scandium (Sc, 44.96 g/mol)
4 moles of Pd(C5H7O2)2 contains how many moles of carbon?
5 mol
10 mol
20 mol
40 mol
2 moles of Rh(O2C5H7)3 contains what mass of hydrogen atoms?
7.07 g
21.21 g
14.14 g
42.42 g
16 moles of NbOCl3 contains how many atoms of niobium?
6.02 x 1023 atoms
2.6578 x 10-23 atoms
9.632 x 1024 atoms
3.7625 x 1022 atoms
2.073 x 1027 atoms
0.25 moles of Zr(ClO4)4 contains how many moles of oxygen?
4 mol
16 mol
64 mol
8 mol
9 moles of Cd(CH3CO2)2 contains what mass of carbon?
48.04 g
24.02 g
216.18 g
432.36 g
864.72 g
0.5 moles of Os3(CO)12 contains how many atoms of oxygen?
7.224 x 1024 atoms
3.612 x 1024 atoms
3.01 x 1023 atoms
1.806 x 1024 atoms
1.204 x 1024 atoms
Which has more molecules, 3 moles of FeO or 3 moles of Fe2O3?
They are the same
FeO
Fe2O3
Which has more mass, 3 moles of FeO or 3 moles of Fe2O3?
They are the same
FeO
Fe2O3
If 1 mole of a compound contains 2 mole of Na, 1 mole of S, and 4 moles of O, what is the mass?
6 g
119.06 g
71.06 g
142.05 g
Compared to 228 grams of F2, 425.4 grams of Cl2 contains
the same number of molecules.
more molecules.
less molecules.
Compared to 1438.2 grams of Br2, 44 grams of He contains
more particles.
less particles.
the same number of particles.
If 0.5 mole of a compound contains 6 moles of carbon, 12 moles of hydrogen, and 8 moles of oxygen, what is the formula of the compound?
C6H12O8
C12H24O16
C3H6O4
If 4 moles of a compound contains 12 moles of manganese and 20 moles of nitrogen, what is the formula of the compound?
Mn12N20
Mn48N80
Mn3N5
Which sample has the largest number of atoms?
3 moles of argon
7 moles of krypton
11 moles of neon
16 moles of helium
How many molecules of N2 are in a volume of 1478.4 L at standard temperature and pressure (STP)?
3.9732 x 1025 molecules
3.1763 x 1025 molecules
1.9936 x 1028 molecules
8.899 x 1026 molecules
What is the number of mole in 4.3344 x 1023 atoms of beryllium?
0.72 mol
6.4872 mol
1.39 mol
12.51 mol
How many atoms of vanadium (V) are in a 16 mmol sample?
9.632 x 1021 atoms
9.632 x 1024 atoms
9.632 x 1027 atoms
What volume (in kL) is 9.03 x 1024 molecules of the gas SO2 at STP?
0.015 kL
15,000 kL
336 kL
0.336 kL
336,000 kL
How much volume (in cL) does a 0.60 mol sample contain?
1344 cL
0.1344 cL
13440 cL
2.68 cL
Convert 4 moles of Co2O3 to mass (grams).
41.465 g
663.44 g
2.408 x 1024 g
835.16 g
0.0241 g
Choose all that apply. Which of the following samples contains 4 moles?
4 grams of oxygen (O, 16 g/mol)
16 grams of helium (He, 4 g/mol)
80.72 grams of neon (Ne, 20.18 g/mol)
19.975 grams of bromine (Br, 79.9 g/mol)
787.88 grams of gold (Au, 196.97 g/mol)
