Molar Mass Review

A student placed one mole of platinum and one mole of silver on a scale. Which weighs more

• Platinum

• Silver

• They both weigh the same

Calculate the molar mass of Fe

• 54.95 g

• 55.85 g

• 55.85

• 54.95

To calculate :How many grams are in 3.11 moles of Mg₃ (PO₃)₂ which conversion factor will you multiply 3.11 moles by?

• 1 mole /6.02 x 10²³ atoms

• 229.94 g/1 mole

• 6.02 x 10 ²³ atoms/1 mole

How many grams are in 3.11 moles of Mg₃ (PO₃)₂

• 715g

• 400g

• 715

• 754g

1 mole of nonsense is equivalent to how many atoms of nonsense?

• 6.02 X 10²³ atoms of nonsense

• 75 g of nonsense

• 0

How will you convert the Z atoms to grams?

• Multiply Z atoms by the conversion factor 1 mole / molar mass

• Multiply Z atoms by the conversion factor 1 mole/6.02 x 10²³ molecules x 1 mole/molar mass

• Multiply Z atoms by the conversion factor 1 mole/6.02 X 10²³ atoms x molar mass/mole

• Multiply Z atoms by the conversion factor 1 mole/molar mass x 1 mole /6.02 x 10²³ atoms

Jad is trying to find how many moles are in 3.4 x 10²³ molecules of I₂ . Which is the correct set up for solving this conversion?

• 1 mole x 3.4 x 10²³ molecules/6.02 x 10 ²³ x 253.8 g

• 3.4 x 10²³ molecules x 6.02 x 10²³/1 mole x 254.8g/1 mole

• 3.4 x 10²³molecules x 1 mole/6.02 x 10²³ molecules x 253.8 g/1 mole

Andi is trying to find how many grams are in 7.8 x 10²² atoms of zinc. Which is the correct sequence of steps Andi should take to solve this conversion?

To convert moles to molecules- what conversion factor will you use?

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³