Moles, Grams, Atoms

Find the mass in grams of 0.75 moles of magnesium (Mg).

• 32 grams
• 18 grams
• 2.21 x 10 ^23 grams

How many moles of carbon are there in 5 g of carbon?

• 60 mol
• 17 mol
• 0.42 mol
• 7 mol

How many moles are there in 12.7 g of CaF₂?

• 0.20 mol
• 1,000.76 mol
• 6.14 mol
• 0.16 mol

How many moles of (NH₄)₂O are present in 74.9 g?

• 3,907.0  moles
• 1.44 moles
• 8.67x10²³moles
• 0.79 moles

What is the mass in grams of 6.25 mol of copper (II) nitrate ,Cu(NO_3⁾2?

• 126 g
• 785 g
• 625 g
• 1172 g

What is the molar mass (formula mass) of Mg₃N₂?

• 191.6 g/mol
• 76.64 g/mol
• 38.32 g/mol
• 100.95 g/mol

Which compound has the smallest molar mass (formula mass)?

• CO
• CO₂
• H₂O
• H₂O₂

How many grams are in 3.3 mol of Potassium Sulfide, K₂S?

• 360 g
• 454 g
• 238 g
• 132 g

Tags

NGSS.HS-PS1-7

Which of the following would have the greatest mass?

• 2 moles He
• 4 moles Ne
• 6 moles B
• 1 mol Pb

In the t-chart for these problems,, what goes in the upper left?

• what you want
• what you are given
•  a "1" always goes there
• the formula mass