A balloon filled with helium has a volume of 6.3 L. What is the mass, in grams, of helium in the balloon?

The mass of helium in the balloon is 1.125 grams

Explanation:

Step 1: Data given

Volume of helium = 6.3 L

Molar mass of helium = 4.0 g/mol

Step 2: Calculate moles helium

1 mol gas = 22.4 L

6.3 L = 0.28125 moles

Step 3: Calculate mass of helium

Mass = moles helium * molar mass helium

Mass = 0.28125 * 4.0 g/mol

Mass = 1.125 grams

The mass of helium in the balloon is 1.125 grams

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