Review Practice

The molar mass of an element is equal to its...

• Atomic mass (from the periodic table)

• Atomic number (from the periodic table)

• Oxidation number

• Valence electrons

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Tags

NGSS.HS-PS1-7

1 mole of anything is equal to:

• 6.02

• 6.02 x 10²³

• 12

• 12.602 x 10²³

The molar mass of calcium is 40.08 g/mol. This means that 1 mole of calcium has a mass of:

• 4.008 grams

• 40.08 grams

• 20 grams

• 20.04 grams

What is the mass of 1.25 mol of Sn?

• 14.839 g
• 148.39 g
• 0.011 g
• 94.4 g

Tags

NGSS.HS-PS1-7

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

Which of the following has the most atoms?

• 1 mole of oxygen

• 1 mole of carbon

• 1 mole of iron

• These all have the same number of atoms

What is the mass of 2.50 mol of oxygen gas O₂?

• 40.0 g
• 80.0 g
• 16.0 g
• 32.0 g

how many atoms are contained in a 456 g sample of carbon dioxide?

• 10.34 atoms

• 6.237 x 10²⁴ atoms

• 1.871 x 10²⁵atoms

• 2.079 x 10²⁴ atoms

How many atoms would be contained in 454 grams of iron (Fe)?

• 6.02x10²³ atoms
• 8.14 atoms
• 4.90x10²⁴ atoms
• 55.85x10²³ atoms