Mole Practice

What is the molar mass of AuCl₃?

• 96 g
• 130 g
• 232.5 g
• 303.3 g

How many moles of copper are 4.57 x 10¹³ atoms of copper?

• 7.59 x 10^-11 moles
• 2.75 x 10³⁷ moles
• 7.59 x 10¹¹ moles
• 2.75 x 10³³ moles

Tags

NGSS.HS-PS1-7

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

How many moles of sulfur atoms are there in 5.0 g of sulfur?

• 160 mol
• 8.3 x 10^-24 mol
• 0.16 mol
• 2.7 x 10^-22 mol

Find the Molar Mass of:
Ga₂(SO₃)₃

• 280 g/mol
• 400 g/mol
• 380 g/mol
• 480 g/mol

What is the mass of 1.2 moles of IrI₃?

• 570 g
• 690 g
• 320 g
• 957 g

How many grams are in 3.3 mol of Potassium sulfide (K₂S)?

• 360 g
• 454 g
• 238 g
• 132 g

Calculate the number of moles in 20.9 grams of N₂

• 1.49 moles

• 0.746 moles

• 0.37 moles

• 1.74 moles

How many grams of silicon would there be in a sample that contained 9.99 x 10^22 atoms?

• 1.69 g

• 4.66 g

• 1.66 g

• 1.79 g

What are the units for molar mass?

• grams
• amu
• grams per mole
• liters