Molar Conversions

How many grams of NaOH do you have to dissolve to make 725 mL of a 2.5 M solution?

• 48.4 g

• 18.2 g

• 72.5 g

• 31.9 g

How many moles are in 72.9 g of HCl?

• 2.00 moles

• 1.34 moles

• 2.97 moles

• 6.02 x 10²³

How many grams are in 3.01 × 10²⁴ molecules of (NH₄)₂SO₄? (Molar Mass (NH₄)₂SO₄ = 132.17 g/mol

• 330.28 g

• 496.81 g

• 660.85 g

• 872.16 g

If Keyarye used 3.92 moles of baking soda (NaHCO₃) for her volcano experiment, how many grams of baking soda (NaHCO₃) did she use? You **must show ALL your work**(calculations)  to receive credit.  NO CREDIT WITHOUT WRITING OUT CALCULATIONS Include the correct units for full credit. (Lose 0.75pts per question for missing/incorrect units) ***HINT*** - watch video walkthrough of study guide in Google Classroom for examples

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88 grams of H₂O (18 g/mol) is how many moles?

• 4.88 moles

• .54 moles

• 6.67 moles

Convert 50.0 grams of H₂O to moles of H₂O.

• 901 moles

• 18.02 moles

• 2.77 moles

Match the following...

• multiplying by the molar mass

• You convert moles to grams by...

• multiplying my avagadro's constant

• You convert moles to particles by...

• dividing by the molar mass

• You convert grams to moles by...

• multiplying by 22.4L

• You convert moles to liters by...

• dividing by 22.4L

• You convert liters to moles by...

What mass of calcium chlorate, Ca(ClO₃)₂, is equivalent to 0.750 moles of the substance?

• 155.24 grams

• 206.98 grams

• 128.65 grams

• 100 g/mol

• 102 g/mol

• 104 g/mol

• 106 g/mol

• 58.44 g/mol

• 60.44 g/mol

• 62.44 g/mol

• 64.44 g/mol