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Question

Write the names of the following compounds and deduce their molar masses.
Na2SO4,K2CO3,CO2,MgCl2,NaOH,AlPO4,NaHCO3

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Solution

Na2SO4 : Sodium sulphate
Molar Mass : 23(2)+32+16(4) = 46+32+64 = 142 g/mol

K2CO3 : Potassium carbonate
Molar Mass : 39(2)+12+16(3) = 78+12+48 = 138 g/mol

CO2 : Carbon dioxide
Molar Mass : 12+16(2) = 12+32 = 44 g/mol

MgCl2 : Magnesium chloride
Molar Mass : 24+35.5(2) = 95 g/mol

NaOH : Sodium hydroxide
Molar Mass : 23+16+1 = 40 g/mol

AlPO4 : Aluminium phosphate
Molar Mass : 27+31+16(4) = 27+31+64 = 122 g/mol

NaHCO3 : Sodium bicarbonate
Molar Mass : 23+1+12+16(3) = 23+1+12+48 = 84 g/mol

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