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Chemistry 5070 · Cambridge (CAIE) O Level

Empirical Formula

7 past-paper questions on Empirical Formula · examined 2020–2024.

20243 questions

5070/12 · O/N · Q10 [1]Sign up to mark my answer →

Compound Z contains carbon, hydrogen and oxygen only. Compound Z contains 48.65% carbon and 8.11% hydrogen by mass. What is the empirical formula of Z?

5070/21 · M/J · Q1(e) [1]Sign up to mark my answer →

State which substance has the empirical formula CH2O.

5070/21 · M/J · Q9(c) [3]Sign up to mark my answer →

A polymer contains 47.1% carbon, 6.5% hydrogen and 46.4% chlorine by mass. Calculate the empirical formula of this polymer.

20231 question

5070/22 · O/N · Q9(c) [2]Sign up to mark my answer →

Deduce the empirical formula of a compound of sodium, iodine and oxygen containing 11.62% sodium, 64.14% iodine and 24.24% oxygen by mass.

20212 questions

5070/21 · M/J · Q2(e) [3]Sign up to mark my answer →

Xenon forms a compound that contains only xenon, oxygen and fluorine. The compound contains 22.1% oxygen by mass and 17.5% fluorine by mass. Calculate the empirical formula of this compound.

5070/22 · O/N · Q4(d) [2]Sign up to mark my answer →

A hydrocarbon contains 88.9% carbon by mass. Calculate the empirical formula of this compound.

20201 question

5070/21 · M/J · Q8(c)(i) [2]Sign up to mark my answer →

Anhydrous aluminium chloride contains 20.2% by mass of aluminium. Show that the empirical formula for anhydrous aluminium chloride is AlCl3.

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