Which of the following does NOT show the law of conservation of mass?

A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO.

B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO.

C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO.

D. 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms.

Question

Chemistry

Lyric Kaufman

10 November, 11:22

Which of the following does NOT show the law of conservation of mass?

A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO.

B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO.

C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO.

D. 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms.

+3

Answers (1)

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Mireya Larson · Answer 1

I think the correct answer from the choices listed above is option B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO does not show the law of conservation of mass. Volumes cannot be added because there are volume effects when you add different substances. So, the reactants is not equal to the product.