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A chemist determines by measurements that 0.0850 moles of oxygen gas participate in a chemical reaction. Calculate the mass of oxygen gas that participates. Be sure your answer has the correct number of significant digits.

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Answer:

The mass of oxygen that participates is 2.72g

Explanation:

Oxygen gas is O2.

O2 has the molar mass of approximately 32.

Mass can be calculated by multiplying the molar mass and the moles.

Moles = Mass/Molar mass

therefore, Mass= Moles*Molar mass

Which is equal to 32*0.085= 2.72g

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