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Introducing chemical reactions

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Question 38

Magnesium reacts with nitrogen gas at high temperatures to form solid magnesium nitride.

What is the correctly balanced symbol equation for this reaction?

$3Mg+2N→Mg3N23\text{Mg} + 2\text{N} \rightarrow \text{Mg}_3\text{N}_2$

$Mg+N2→MgN2\text{Mg} + \text{N}_2 \rightarrow \text{MgN}_2$

$3Mg+N2→Mg3N23\text{Mg} + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2$

$2Mg+N2→Mg2N22\text{Mg} + \text{N}_2 \rightarrow \text{Mg}_2\text{N}_2$

Markscheme

Introducing chemical reactions Questions

GCSE
Chemistry
Introducing chemical reactions

55 exam-style questions on OCR GCSE Chemistry Introducing chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.

Introducing chemical reactions

Question bank

Introducing chemical reactions

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Question 38

Magnesium reacts with nitrogen gas at high temperatures to form solid magnesium nitride.

What is the correctly balanced symbol equation for this reaction?

$3Mg+2N→Mg3N23\text{Mg} + 2\text{N} \rightarrow \text{Mg}_3\text{N}_2$

$Mg+N2→MgN2\text{Mg} + \text{N}_2 \rightarrow \text{MgN}_2$

$3Mg+N2→Mg3N23\text{Mg} + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2$

$2Mg+N2→Mg2N22\text{Mg} + \text{N}_2 \rightarrow \text{Mg}_2\text{N}_2$

Markscheme

Introducing chemical reactions Questions

GCSE
Chemistry
Introducing chemical reactions

55 exam-style questions on OCR GCSE Chemistry Introducing chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.