DP Chemistry (last assessment 2024)

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Question 18M.1.sl.TZ1.4

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.sl.TZ1.4
Level sl Paper 1 Time zone TZ1
Command term Derive Question number 4 Adapted from N/A
4.
[Maximum mark: 1]
18M.1.sl.TZ1.4

What is the percentage yield when 7 g of ethene produces 6 g of ethanol?

Mr(ethene) = 28 and Mr(ethanol) = 46

C2H4(g) + H2O(g) → C2H5OH(g)

A.      6 × 7 × 100 28 × 46

B.      6 × 46 × 100 7 × 28

C.      6 × 28 7 × 46 × 100

D.      6 × 28 × 100 7 × 46

[1]

Markscheme

D