The Mole Concept

Find the Molar Mass of:

Ga₂(SO₃)₃

• 320.56 g/mol

• 400.52 g/mol

• 393.42 g/mol

• 379.64 g/mol

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.0500 moles

• 1.81 x 10⁴⁶ moles

• 5.00 x 10²¹ moles

• 5.00 moles

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg

• 9.03x10²⁴ atoms Hg

• 903 atoms of Hg

• 9.03 atoms of Hg

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃? (Atomic mass of Al = 27, H= 1, O = 16)

• 1.26 moles

• 0.8 moles

• 7,673.4 moles

• 150 moles

How many grams of silicon (atomic mass = 28.1 amu) 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

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules

• 180 molecules

• 180 g

• 6.02 x 10²³ molecules

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg

• 9.03x10²⁴ atoms Hg

• 903 atoms of Hg

• 9.03 atoms of Hg

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

• 5.77 x 10²³

• 5.04 x 10²⁴

• 5.77 x 10²⁶

• 5.04 x 10²³