A college chemistry student is performing this reaction in a lab, where magnesium is burned and combines with oxygen from the air to produce magnesium oxide. The students burns 2.92 g of Mg, and there is excess oxygen from the air. They incorrectly u'culated that the mass of magnesium oxide produced was 2.42 g. Here is their work: 2.92 g 1 mol 2 mol 40.3 g 2.42 g 1 24.3 g 1 mol 1 mol 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 their work? There is an improvement that can be made to help them avoid this mistake in the future. pts) 3) Instead of 2.42 g, what answer should the student have gotten?

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A college chemistry student is performing this reaction in a lab, where magnesium is burned
and combines with oxygen from the air to produce magnesium oxide.
The students burns 2.92 g of Mg, and there is excess oxygen from the air. They incorrectly
'culated that the mass of magnesium oxide produced was 2.42 g. Here is their work:
2.92 g
1 mol
2 mol
40.3 g
= 2.42 g
1
24.3 g
1 mol
1 mol
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 their work?
There is an improvement that can be made to help them avoid this mistake in the future.
pts)
3) Instead of 2.42 g, what answer should the student have gotten?
Transcribed Image Text:A college chemistry student is performing this reaction in a lab, where magnesium is burned and combines with oxygen from the air to produce magnesium oxide. The students burns 2.92 g of Mg, and there is excess oxygen from the air. They incorrectly 'culated that the mass of magnesium oxide produced was 2.42 g. Here is their work: 2.92 g 1 mol 2 mol 40.3 g = 2.42 g 1 24.3 g 1 mol 1 mol 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 their work? There is an improvement that can be made to help them avoid this mistake in the future. pts) 3) Instead of 2.42 g, what answer should the student have gotten?
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