(a) (i) It is used to remove oxygen from air.
(ii) It removes CO2 produced by the burning candle and also from air.
(b) (i) Argon/Neon/Krypton.
(ii) Concentrated sulphuric (VI) acid.
sharon kalunda answered the question on March 28, 2019 at 06:51
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Date posted: March 28, 2019. Answers (1)
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Date posted: March 28, 2019. Answers (1)
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(ii) hydrochloric acid(Solved)
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Isotope ...(Solved)
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Percentage abundance 92.2 4.7 3.1
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Name the bond type represented by letter X and W.
Date posted: March 27, 2019. Answers (1)