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Question 81

Lithium, sodium and potassium are highly reactive metals in group 1 of the periodic table.

Lithium metal burns in oxygen to form lithium oxide. In a laboratory experiment, 4.2 g of lithium combined with 4.8 g of oxygen to form this oxide.

Calculate the empirical formula of this lithium oxide. (Relative atomic masses, $ArA_{\text{r}}$ : $Li=7\text{Li} = 7$ , $O=16\text{O} = 16$ )

You must show your working.

[3]

Markscheme

Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

Calculations involving masses

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Calculations involving masses

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Question 81

Lithium, sodium and potassium are highly reactive metals in group 1 of the periodic table.

Lithium metal burns in oxygen to form lithium oxide. In a laboratory experiment, 4.2 g of lithium combined with 4.8 g of oxygen to form this oxide.

Calculate the empirical formula of this lithium oxide. (Relative atomic masses, $ArA_{\text{r}}$ : $Li=7\text{Li} = 7$ , $O=16\text{O} = 16$ )

You must show your working.

[3]

Markscheme

Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.