Chem B: Moles. Molecules and Grams

Determine the amount of moles in CuBr that are in 276.9 g of the compound.

• 3.2 mol

• 1.7 mol

• 2.110 mol

• 1.930 mol

Find the mass of 5.82 mol of MgCl₂.

• 554 g

• 436. g

• 55.2 g

• 555.9 g

How many molecules are there in 31.8 moles of water?

• 5.28 x 10^-23 molecules
• 1.91 x 10²⁵ molecules
• 5.28x 10-²⁵
• 1.91 x 10²²

Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

Tags

NGSS.HS-PS1-7

How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)₃?

• 1.26 moles

• 0.8 moles

• 7,670 moles

• 1.63 x 10^-22 moles

Tags

NGSS.HS-PS1-7

How many molecules are in 84.0 g of C₅H₅N?

• 4.00 x 10²⁷ molecules
• 6.40 x 10²³ molecules
• 1.10 x 10^-20 molecules
• 5.06 x 10²⁵ molecules

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

• 48 g/mole
• 34.02 g/mole
• 36.5 g/mole
• 35.5 g/mole

How many moles are in 16.94g of water?

• 16.94 mol H₂O
• 0.9401 mol H₂O
• 305.3 mol H₂O
• 1.063 mol H₂O

Tags

NGSS.HS-PS1-7

How many grams are in 3.30 x10²³ molecules of N₂I₃

• 126g
• 261g
• 789g
• 224g

How many moles of sodium chloride are in a 321.8 g sample?

• 18810 moles

• 3.315 x 10²⁴ moles

• 5.507 moles

• 4.767 moles

Tags

NGSS.HS-PS1-7