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Atoms and reactions

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Question 14

How many electrons are removed from 1.20 × 10-2 g of He(g)\text{He(g)}He(g) atoms to form He+(g)\text{He}^+\text{(g)}He+(g) ions?

A

4.98×10−274.98 \times 10^{-27}4.98×10−27

B

3.00×10−33.00 \times 10^{-3}3.00×10−3

C

1.81×10211.81 \times 10^{21}1.81×1021

D

7.22×10217.22 \times 10^{21}7.22×1021

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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