Question

What is molar mass? How many moles of water is present in a 5g of water drop?​

Answer 1

Answer:

the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. ... In the International System of Units (SI), the base unit of molar mass is kg/mol.

Molecular mass of water = 18 g

The number of moles of water=n=  

Molecular wt.

weight

​  

=  

18

0.05

​  

=2.78×10  

−3

 

Now, number of molecules of water=n×6.022×10  

23

 

=2.78×10  

−3

×6.022×10  

23

 

=1.67×10  

21

molecules

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