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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 10

A state-of-the-art DNA origami nanostructure designed for targeted drug delivery consists of a self-assembled bundle of 888 identical engineered DNA scaffold strands.

The entire assembled nanostructure has an approximate relative formula mass (MrM_rMr​) of 18,400,000,00018,400,000,00018,400,000,000.

a.

What is the approximate relative formula mass of the DNA nanostructure written in standard form?

[2]
b.

What is the approximate relative formula mass (MrM_rMr​) of each of the 888 individual DNA scaffold strands?

[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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