Combined Mole Problems

How many atoms of carbon are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams CO

• 56 grams CO

• 6.02 grams CO

• 1.2 grams CO

How many molecules of water are in a 821.3 g sample?

• 45.58 molecules

• 8.232 x 10²⁵ molecules

• 8.909 x 10²⁷ molecules

• 2.744 x 10²⁵ molecules

Tags

NGSS.HS-PS1-7

What would be the mass of 9.76 x 10²² formula units of SrCl₂?

• 25.7 g SrCl₂

• 0.1622 g SrCl₂

• 20.0 g SrCl₂

• 0.3589 g SrCl₂

A sample of AlCl₃ contains a total of 4.515 x 10²⁷ atoms of chlorine. What must be the mass of this sample?

• 2.500 x 10⁵ g

• 1.000 x 10⁶ g

• 18.75 g

• 3.333 x 10⁵ g

Tags

NGSS.HS-PS1-7