2Mg(s) + O₂(g) →→→ 2MgO(s) A chemistry student is performing this reaction in a lab, in which magnesium is burned a combines with oxygen from the air to produce magnesium oxide. The student burns 2.92 g of Mg with oxygen from the air. The student incorrectly calcula that the mass of magnesium oxide produced was 9.69g. The work is below: 2.92 g 1 X 1 mol X 24.3 g 2 mol 1 mol 40.3 g 1 mol = 9.69g 1) What did the student do wrong? There is an error in their work. Explain specifically wha part is incorrect. 2) What recommendation(s) would you give to the student regarding showing the work? There is an improvement that can be made to help the student avoid this mistake in the future. 3) Instead of 9.69g, what answer should the student have calculated?

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2Mg(s) + O₂(g) → 2MgO(s)
A chemistry student is performing this reaction in a lab, in which magnesium is burned and
combines with oxygen from the air to produce magnesium oxide.
The student burns 2.92 g of Mg with oxygen from the air. The student incorrectly calculated
that the mass of magnesium oxide produced was 9.69g. The work is below:
2.92 g
1
X
1 mol
24.3 g
2 mol
1 mol
X
40.3 g
1 mol
= 9.69g
1) What did the student do wrong? There is an error in their work. Explain specifically what
part is incorrect.
2) What recommendation(s) would you give to the student regarding showing the work?
There is an improvement that can be made to help the student avoid this mistake in the
future.
3) Instead of 9.69g, what answer should the student have calculated?
Transcribed Image Text:2Mg(s) + O₂(g) → 2MgO(s) A chemistry student is performing this reaction in a lab, in which magnesium is burned and combines with oxygen from the air to produce magnesium oxide. The student burns 2.92 g of Mg with oxygen from the air. The student incorrectly calculated that the mass of magnesium oxide produced was 9.69g. The work is below: 2.92 g 1 X 1 mol 24.3 g 2 mol 1 mol X 40.3 g 1 mol = 9.69g 1) What did the student do wrong? There is an error in their work. Explain specifically what part is incorrect. 2) What recommendation(s) would you give to the student regarding showing the work? There is an improvement that can be made to help the student avoid this mistake in the future. 3) Instead of 9.69g, what answer should the student have calculated?
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