D] Virite the names of the following: Compounds and device their molecular masses :
1. Na2S04 Na2=1,So4=2
2. MgCl2 Mg=2,Cl2=1
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Answer:
Na
2
SO
4
: Sodium sulphate
Molecular Mass : 23(2)+32+16(4) = 46+32+64 = 142 g/mol
K
2
CO
3
: Potassium carbonate
Molecular Mass : 39(2)+12+16(3) = 78+12+48 = 138 g/mol
CO
2
: Carbon dioxide
Molecular Mass : 12+16(2) = 12+32 = 44 g/mol
MgCl
2
: Magnesium chloride
Molecular Mass : 24.31+35.5(2) = 95.31 g/mol
NaOH : Sodium hydroxide
Molecular Mass : 23+16+1 = 40 g/mol
AlPO
4
: Aluminium phosphate
Molecular Mass : 27+31+16(4) = 27+31+64 = 122 g/mol
NaHCO
3
: Sodium bicarbonate
Molecular Mass : 23+1+12+16(3) = 23+1+12+48 = 84 g/mol
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