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A-LevelChemistryGroup 29701/12 · May/June 2020 · Q131 Mark

Magnesium nitrate, Mg(NO3)2, decomposes when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of nitrogen, X. 7.4 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of X is produced?

A1.5 g

B2.3 g

C3.0 g

D4.6 g

✓ Correct answer

D: 4.6 g

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About this question

Topic: Group 2, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2020 Paper 1 Variant 2, question 13.

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