The Mole

Mole ratios are obtained from the

• balanced chemical equation

• periodic table

• molar mass

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

• 28 grams

• 56 grams

• 6.02 grams

• 1.2 grams

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 96 g

• 130 g

• 232.5 g

• 303.3 g

What is the molar mass of (NH₄)₂CO₃ ?

• 144 g

• 138 g

• 96 g

• 78 g

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 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

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

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