Question

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Q9 b)

Answer 1

Hi there

The molar mass for compound is the sum of atomic masses of elements which composes the compound

♤ Given

• Na atomic mass =23

• S atomic mass = 32

• O atomic mass = 16

• H atomic mass = 1

• N atomic mass = 14

• C atomic mass = 12

•Mg atomic mass = 24

◇The molar mass of Na2SO4.10H2O

=23×2+32+16×4+10×18=322 g/mol

◇The molar mass of (NH4)2CO3

= 14×2+8×1+12+16×3= 96 g/mol

◇The molar mass of (NH2)2CO

= 14×2+1×4+12+16= 60g/mol

◇The molar mass of Mg3N2

= 24×3+14×2= 100 g/ mol

♡ Hope the answer is helpful

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