IGCSE Chemistry 0620/32/F/M/21 Q8d-e

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(d) Aqueous ammonia reacts with aqueous copper(II) ions to produce compound B.
The formula of compound B is CuN4H16O2.
Complete the table to calculate the relative molecular mass of compound B.
type of atom    number of atoms   relative atomic mass
copper 1 64 1 × 64 = 64
nitrogen 4 14 4 × 14 = 56
hydrogen 1
oxygen 16
relative molecular mass = …………………………
[2]

(e) Ammonia is used in the production of fertilisers.
State why farmers put fertilisers on the soil where crops are to be grown.
……………………………………………………………………………………………………………………………. [1]

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    2022-07-04T17:39:39+08:00

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