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5.1 Monitoring chemical reactions

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Question 50
F

A reaction makes a desired product, X, and some waste products.

The relative formula mass of X is 60.

The atom economy for making X is 75%.

What is the total relative formula mass of the waste products in the balanced equation?

[1]
A

15

B

20

C

45

D

80

Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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