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Equation: 2H2 + O2 —> 2H2O

How many moles of hydrogen will be required to react with 2.1g of oxygen gas
(0₂)?

User Gaket
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1 Answer

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To solve this problem, we need to use the balanced chemical equation and the molar mass of oxygen gas to determine the number of moles of oxygen present:

2H2 + O2 -> 2H2O

Molar mass of O2 = 32 g/mol

2.1 g O2 x (1 mol O2/32 g O2) = 0.0656 mol O2

From the balanced equation, we know that 1 mole of O2 reacts with 2 moles of H2. Therefore, we can use a mole ratio to determine the number of moles of hydrogen required:

0.0656 mol O2 x (2 mol H2/1 mol O2) = 0.1312 mol H2

Therefore, 0.1312 moles of hydrogen will be required to react with 2.1g of oxygen gas.
User Linehrr
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