Question

calculate the molecular mass of
a) CO2
b)CL2
c)NH3​

Answer 1

Explanation:

◆Molecular mass of Cl2= 2 x Atomic mass of Cl

= 2 x 35.5

= 71 u

◆Molecular mass of CO2= Atomic mass of C + 2 x Atomic mass of O

= 12 + 2 x 16

◆Molecular mass of NH3= Atomic mass of N + 3 x Atomic mass of H

= 14 + 3 x 1

= 17 u

Answer 2

i) Molecular mass of CO2= Atomic mass of C + 2 x Atomic mass of O

= 12 + 2 x 16

= 44 u

ii) Molecular mass of Cl2= 2 x Atomic mass of Cl

= 2 x 35.5

= 71 u

iii)i) Molecular mass of NH3= Atomic mass of N + 3( Atomic mass of H)

= 14 +3( 1)

= 17 u

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