Q.

Molecular mass of Phosphorous is equal to

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a

31 u

b

124 u

c

31 g

d

124 g

answer is B.

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Detailed Solution

Molar mass is the mass of one mole of a substance expressed in grams;One mole of phosphorous ( P4 ) has a mass of 124 g;So molar mass of phosphorous is 124 g ;Molecular weight or molecular mass has no units, it is expressed in unified mass;So molecular mass of phosphorous is 124 u ;
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