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3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

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Question 20

An engineered macromolecular protein cage is assembled from 888 identical polypeptide monomer subunits.

The entire complex has an approximate relative formula mass (MrM_rMr​) of 5,600,000,000,0005,600,000,000,0005,600,000,000,000.

a.

What is the approximate relative formula mass of the protein cage written in standard form?

[1]
b.

What is the approximate relative formula mass (MrM_rMr​) of each of the 888 individual monomer subunits?

[2]
Markscheme

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

53 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.

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