Mole and Mass Calculations Worksheet

Calculate the number of moles in 25 grams of sodium chloride (NaCl). The molar mass of NaCl is 58.44 g/mol. Moles of NaCl = Mass (g) / Molar Mass (g/mol) Number of moles =

• 0.428 moles

• 0.250 moles

• 0.585 moles

• 1.00 moles

How many moles of oxygen (O) are there in 32 grams of oxygen gas (O₂)? The molar mass of O₂ is 32.00 g/mol. Moles of O = Mass (g) / Molar Mass (g/mol) Number of moles = _______

• 1 mole

• 0.5 mole

• 2 moles

• 16 moles

What is the mass in grams of 3 moles of carbon (C)? The atomic mass of carbon is 12.01 g/mol. Mass (g) = Moles × Molar Mass (g/mol) Fill in the blank: Mass = _______ g

How many grams of hydrogen (H) are required to have 2 moles of hydrogen gas (H₂)? The atomic mass of hydrogen is 1.008 g/mol. Mass (g) = Moles × Atomic Mass (g/mol) Fill in the blank: Mass = _______ g

Tags

NGSS.HS-PS1-7

Find the number of moles in 150 grams of glucose (C₆H₁₂O₆). The molar mass of glucose is 180.16 g/mol. Moles = Mass (g) / Molar Mass (g/mol) Number of moles = _______

• 0.833 moles

• 1.20 moles

• 0.555 moles

• 0.450 moles

How many grams of sulfur (S) are needed to have 4 moles of sulfur? The atomic mass of sulfur is 32.07 g/mol. Mass (g) = Moles × Atomic Mass (g/mol) Mass = _______ g

• 128.28 g

• 32.07 g

• 64.14 g

• 8.02 g

Tags

NGSS.HS-PS1-7

What is the number of moles in 100 grams of calcium carbonate (CaCO₃)? The molar mass of CaCO₃ is 100.09 g/mol. Moles = Mass (g) / Molar Mass (g/mol) Number of moles =

• 0.999 moles

• 1.50 moles

• 0.500 moles

• 2.00 moles

Find the mass in grams of 0.5 moles of sodium bicarbonate (NaHCO₃). The molar mass of NaHCO₃ is 84.01 g/mol. Mass (g) = Moles × Molar Mass (g/mol) Mass = _______ g

• 42.005 g

• 21.0025 g

• 84.01 g

• 0.168 g

How many moles of nitrogen (N) are present in 28 grams of nitrogen gas (N₂)? The molar mass of N₂ is 28.02 g/mol. Moles of N = Mass (g) / Molar Mass (g/mol) Number of moles = _______

• 1 mole

• 0.5 mole

• 2 moles

• 28 moles

What is the mass in grams of 0.25 moles of iron (Fe)? The atomic mass of iron is 55.85 g/mol. Mass (g) = Moles × Atomic Mass (g/mol) Fill in the blank: Mass = _______ g

Tags

NGSS.HS-PS1-7