Mole Conversion

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

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

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

What is the mass of 0.89 mol of CaCl₂?

• 111 grams
• 0.008 grams
• 98.9 grams
• none of the choices

Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"

• 1 mol = 22.4 L 
• 1 mol = 39.95 g
• 1 mol = 6.02x10²³ atoms
• More than 1

You have 3.5 L of H₂ (g) at STP. How many moles of gas are there?

• 22.4 mol
• 22.4 L
• 0.16 mol
• 0.16 L

36.0 g of Be contains how many moles?

• 0.25 mol
• 4.0 mol
• 45 mol
• 320 mol

How many grams are in 88.1 moles of magnesium?

• 2141 g
• 0.3 g
• 30 g
• 3.6 g

What is the molar mass of (NH₄)₂SO₄?

• 66 g/mole
• 114 g/mole
• 100 g/mole
• 132 g/mole

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

• 28 grams
• 56 grams
• 6.02 grams
• 1.2 grams

The number 6.02 x 10²³ is ______.

• molar mass
• molecules
• Avogadro's number
• hydrate