Mass to Moles / Moles to Mass Conversions

How many moles are in 16.94 g of water? Molar Mass of Water is 18 g/mol

• 16.94 mol H₂O

• 0.9401 mol H₂O

• 305.3 mol H₂O

• 1.063 mol H₂O

Determine the mass of 4.20 moles of C₆H_12. Molar Mass is 84.16 g/mol

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

Shivani measures out 6.0 moles of epsom salt (MgSO₄) to put in her bath. How many grams of MgSO₄ went in the bath? Molar Mass of MgSO₄ is 120.3 g/mol

• 3.6 x 10²⁴ g

• 720 g

• 0.050 g

• 340 g

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

Reorder the following amounts of substances from largest MASS to smallest. Largest is 1. So basically, which substance would weigh the most if you put in on the scale. Then go from there.

• 1 mole of CuO₂

• 1 mole of Cu

• 1 mole of H₂O

• 1 mole of Na

• 1 mole of Cu₂O

0.75g of Al₂O₃ is ​​ (a)   moles. First calculate the molar mass.

• 0.007
• 1.08
• 0.02
• 1.00
• 7.0 x 10^-4

Challenger! Which of the following pairs, from the drag-and-drop menu, are correct? ​ (a)   of CO₂ is ​ (b)   . The molar mass of CO₂ is 44 g/mol. Hint: Find out how many grams each amount of moles is. Then match the correct mole with the correct amount of grams.

• 0.07 moles
• 3.08 g
• 1.2 moles
• 44 g
• 89 g
• 2.88 moles
• 2.3 g

4.5 x 10^-2 moles of O₂ has a mass of ​ (a)   . Molar mass of O₂ is 32 g/mol

• 1.44 g
• 16.0 g
• 10.2 g
• 13.3 g

209 g of Gold is ​ (a)   . Use your periodic table to get the mass of gold!

• 1.06 moles
• 0.99 moles
• 1.8 moles
• 1.002 moles

50 g of N₂ is ​ (a)   . Use your periodic table get the molar mass of N_2!

• 1.78 moles
• 2.01 moles
• 1.99 moles
• 1.55 moles