The Mole Quizizz

Which statement is true?

• To convert from particles to moles, you use the molecular mass of the substance as a conversion factor.

• To convert from particles to moles, you use Avogadro's number as a conversion factor.

• To convert from moles to mass, you use Avogadro's number as a conversion factor.

• It is impossible to convert from particles to moles, or from moles to mass.

How many atoms of sulfur are in a sample of sulfur with a mass of 25 grams?

• 1.2 x 10²² atoms S

• 4.825 x 10²⁵ atoms S

• 4.69 x 10²³ atoms S

• 1.33 x 10²⁵ atoms S

What is the mole ratio of iron to oxygen in the compound Fe₂O₃?

• 2:2

• 2:3

• 3:3

• 1:1

How many moles of aluminum are in 4.5 moles of Al₃PO₄?

• 13.5 mol Al

• 4.5 mol Al

• 18 mol Al

• 1.5 mol Al

What is the mass of 3.5 moles of NaCl?

• 0.60 g NaCl

• 58.443 g NaCl

• 16.7 g NaCl

• 204.55 g NaCl

What is the mass of a sample of CaBr₂ that has 8.33 x 10²³ atoms?

• 10023 g CaBr₂

• 276.6 g CaBr₂

• 0.250 g CaBr₂

• 144 g CaBr₂

How many moles of Fe₃(PO₄)₂ are in a sample with a mass of 700.0 grams?

• 1.96 mol Fe₃(PO₄)₂

• 0.511 mol Fe₃(PO₄)₂

• 6.81 mol Fe₃(PO₄)₂

• 2.50 x 10⁵ mol Fe₃(PO₄)₂

How many grams of chlorine are in 2.5 moles of MgCl₂?

• 88.6 g Cl

• 44.3 g Cl

• 7.1 g Cl

• 177.25 g Cl

What is the molecular mass of Cu(NO₃)₂?

• 93.56 g/mol

• 251.12 g/mol

• 187.57 g/mol

• 375.14 g/mol

How many potassium ions are in 200 grams of K₂SO₄?

• 1.38 x 10²⁴ ions K

• 6.91 x 10²³ ions K

• 3.81 x 10²² ions K

• 2.29 ions K