Question

Calculate the number of moles in the following:

i 136 g of ammonia

ii 160 g of methane

iii 250 g of calcium carbonate

iv 2.9 g of magnesium hydroxide. (4 marks)

c 15.3 g of an unknown substance was found to contain 0.15 moles.

Calculate the relative formula mass of the substance.

Answer 1

Answer:

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