Question
Asked Nov 15, 2019
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How many moles of hydrogen gas are generated by 0.039 grams of magnesium? Report the answer to four significant figures. DO NOT USE EXPONENTS.

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Expert Answer

Step 1

Given:

Mass of Magnesium = 0.039 g.

Molar mass of Mg = 24.305 g/mol.

Balanced chemical reaction is given by:

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Mg 2H20Mg(OH)2 +H2

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Step 2

Calculation for mo...

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mass number of moles molar mass 0.039 g number of moles 24.305g/mol number of moles = 0.0016moles

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Chemistry

General Chemistry

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