Grams of Element to Moles

Which has more moles of particles?

• 12.0 g carbon

• 6.94 g lithium

• 10.81 g boron

• all have the same number of moles

How many moles is in 25.0 g of calcium?

• 25.0 moles

• 0.62 moles

• 1.60 moles

• 40.0 moles

Determine the number of moles in 25.0 grams of potassium sulfide (K₂S).

• 0.23 moles

• 4.41 moles

• 110.3 moles

• 25.0 moles

Determine the number of moles in 1.50 grams of copper metal.

• 1.50 grams

• 0.023 moles

• 42.4 moles

• 6.02x10²³

Which weighs more?

• 1 mole of lithium

• 1 moles of carbon

• 1 mole of sodium

• 1 mole of silicon

What is the mass of 0.25 moles of rubidium bromide (RbBr)?

• 165.34 g

• 0.25 g

• 41.3 g

• 0.024 g

Tags

NGSS.HS-PS1-7

How many moles are in 30.0 grams of silicon dioxide (SiO₂)

• 60.1 moles

• 30.0 moles

• 0.50 moles

• 2.00 moles

Tags

NGSS.HS-PS1-7

If you had 20.0 g of each of the following, which would have the most moles?

• LiCl

• NaCl

• KCl

• RbCl

How many grams does 0.50 moles of silicon dioxide (SiO₂) weigh?

• 2.0 g

• 0.50 g

• 60.1 g

• 30.0 g

What is the molar mass of copper sulfate (CuSO₄)?

• 159.6 g/mole

• 111.6 g/mol

• 77.0 g/mol

• none of these