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Calculate the percentage by weight of magnesium in magnesite (MgCO3)?

Magensite, MgCO3, is the principal ore in Australia. This ore can be analysed by reacting it with hydrochloric acid solution.

Calculate the percentage by weight of magnesium in magnesite.

Could you please show working out.

ThanksGreetings,

Molar mass of Mg = 24.305 g/mol
Molar mass of magnesite MgCO3 = 84.314

percentage by weight magnesium in magnesite
= mass Mg/ mass magnesite x 100%
=24.305/84.318 x 100%
= 28.8%

Regards