Question

Calculate the molecular mass of Pbcl2 Cu=63.5, S=32,O=16,Na=32,Cl=35.5,Pb=207,N=14,H=11
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Answer 1

Answer:

207+(35.5)×2

= 207+71.0

= 278.0 or 278 is ans.

Answer 2

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⚾ What Is molecular mass?

Molecular mass ofca substance is defined as the sum of the atomic masses of all the atoms present in the molecule of substance.

◆ It is generally measured in atomic mass unit ( u ).

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✏ We have to calculate the molecular mass of

PbCl₂

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molecule of PbCl₂ ( Lead chloride) have

♠︎ 1 atom of Pb ( Lead)

♠︎ 2 atoms of Cl ( chlorine)

(✍ Given atomic mass of Pb is 207 u and of Cl is 35.5 u)

so,

Molecular mass of PbCl₂

= 207 + 2 ( 35.5 ) u

= 207 + 71 u = 278 u

Molecular mass of lead chloride will be

278 u. ( Ans.)