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5.1 Monitoring chemical reactions

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Question 33

A technician collects 0.360 dm30.360\,\mathrm{dm^{3}}0.360dm3 of ammonia gas, NH3\mathrm{NH_{3}}NH3​, in a gas syringe at room temperature and pressure.

One mole of any gas occupies 24 dm324\,\mathrm{dm^{3}}24dm3 at room temperature and pressure.

Relative atomic mass (ArA_rAr​): H = 1.0 N = 14.0

What is the mass of ammonia in the gas syringe?

[1]
A

0.0150 g

B

0.255 g

C

0.508 g

D

0.225 g

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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