Asked Nov 15, 2019

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.


Expert Answer

Step 1


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

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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