Question

1. Write the names of the compounds and deduce their molecular mass a) Na2CO3. (Na=23,C=12,O=16)​

Answer 1

Answer:

Name is sodium carbonate and if 10 crystals of hydrogen is added then the answer is Washing soda

Molecular Mass  = 23x2 +12+16x3=106

I hope you got it!!

Answer 2

Answer:

Na2SO4 : Sodium sulphate 

Molecular Mass : 23(2)+32+16(4) = 46+32+64 = 142 g/mol

K2CO3 : Potassium carbonate

Molecular Mass : 39(2)+12+16(3) = 78+12+48 = 138 g/mol

CO2 : Carbon dioxide

Molecular Mass : 12+16(2) = 12+32 = 44 g/mol

MgCl2 : Magnesium chloride

Molecular Mass : 24.31+35.5(2) = 95.31g/mol

NaOH : Sodium hydroxide

Molecular Mass : 23+16+1 = 40 g/mol

AlPO4 : Aluminium phosphate

Molecular Mass : 27+31+16(4) = 27+31+64 = 122 g/mol

NaHCO3 : Sodium bicarbonate

Molecular Mass : 23+1+12+16(3) = 23+1+12+48 = 84 g/mol

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