WorksheetsMole Concepts
Total questions: 20
Worksheet time: 10mins
How many atoms of iodine are in a mole of iodine?
a. 126.99
b. 53
c. 63.55g
d. 6.02 x 1023
What is the molar mass of NaCl?
a. 58.45g/mol
b. 28g/mol
c. 12g/mol
d. 6.02 x 1023
What would be the mass of 1.5 mol H2O ?
a. 20 g
b. 27g
c. 32g
d. 40g
Convert 4.5x1024 atoms to moles
a. 0.747 particles
b. 0.722 mol
c. 2.71x1047 mol
d. 2.71x1047 particles
Convert 5g of carbon to moles
a. 60 mol
b. 17 mol
c. 0.42 mol
d. 7 mol
Convert 25 g of NaBr to molecules
a. 102.96 molecules
b. 0.24 molecules
c. 1.45x1023 molecules
d. 2.34 x 1020molecules.
Convert 5.11x1023 atoms of lithium to moles?
a. 1.18
b. 0.351
c. 1.34
d. 0.849
Convert 0.454 moles of neon (Ne) to liters?
a. 49.34 L
b. 101.17 L
c. 10.17 L
d. 0.0202 L
Which of the following setups will correctly change 27.76g of Li to atoms of Li?
a. A
b. B
c. C
d. D
Which of the following setups will correctly change 2.50 moles of sodium to grams of sodium?
a. A
b. B
c. C
d. D
Which of the following setups will correctly change 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
a. setup B : 0.6644mol Co
b. setup A: 2.41x1047mol Co
c. setup A : 0.664mol Co
d. setup B: 2.41x1047mol Co
What’s the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen?
a. Li2CO2
b. Li2CO3
c. Li2CO
d. LiCO3
A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole has which molecular formula?
a. C8H8O2
b. C12H12O3
c. C16H16O4
d. CH4O
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Atomic mass of Al = 27, H= 1, O = 16)
a. 1.26 moles
b. 0.8 moles
c. 7,673.4 moles
d. 150 moles
How many atoms are contained in 25 g of NaBr? (Atomic
a. 1.45x1023 molecules
b. 0.24 molecules
102.96 molecules
d. 2.34 x 1020molecules
Identify the number of Chlorine atoms in 65.8 g CaCl2.
a. 7.14 x 1023 atoms
b. 8.71 x 1023 atoms
c. 1.22 x 1023 atoms
Incorrect
d. 3.57 x 1023 atoms
How many moles are in 3.01 x 1022 atoms of magnesium?
Correct
a. 0.0500 moles
b. 0.8 moles
c. 7,673.4 moles
d. 5.00 moles
How many molecules are in 2.00 moles of H2O?
124g
b. 124x1024 molecules of H2O
c. 1.20x1023 molecules of H2O
d. 1.20x1024 molecules H2O
How many atoms are in 1.50 moles of Hg.
a. 9.03x1023 atoms Hg
b. 9.03x1024 atoms Hg
c. 7,673.4 moles
903 atoms of Hg
d. 9.03 atoms of Hg.
How many grams are in 1.2 x 1024 molecules of CO? (molar mass of CO = 28 g/mol)
6.02g
b. 28.2 g
c. 55.8 g
d. 1.2 g
