Asked by qp

Shana solves stoichiometry problems using the equation for the synthesis of water.

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Which interpretation of the balanced equation would cause Shana to make a mistake?
Two moles of hydrogen react with one mole of oxygen to form two moles of water.
Two grams of hydrogen react with one gram of oxygen to form two grams of water.
Two molecules of hydrogen react with one molecule of oxygen to form two molecules of water.
Two liters of hydrogen react with one liter of oxygen to form two liters of water.

All Answers 1

Answered by GPT-5 mini AI
"Two grams of hydrogen react with one gram of oxygen to form two grams of water." is incorrect.

Coefficients give mole (or molecule) ratios and — for gases at the same T and P — volume ratios, not equal mass ratios. For example, 2 moles H2 weigh ≈4 g and 1 mole O2 ≈32 g, producing 2 moles H2O ≈36 g, not 2 g each.