Atoms and Molecular Formulas

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

*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 molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O

• 1.20x10²³ molecules of H₂O

• 1.20x10²⁴ molecules H₂O

• 124

*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 molecules are in 9.4 moles of AlCl₃?

• 5.66

• 5.66x10²⁴

• 0.705

• 1.25x10²³

*How many moles are 2.85 x 10¹⁸ atoms of iron?

• 4.73 x 10^-6 moles

• 1.72 x 10⁴² moles

In chemistry, a "mole" is:

• The mass of an atom
• a large number used to count particles
• based on the volume of a substance

*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

*How many formula units are there in 2.45 moles potassium chloride?

• 4.07 x 10^-24

• 1.47 x 10²⁴

• 1.47

• 4.07

*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