Question

Calculate total number of atoms in 1.96 g of sulphuric acid. [ H=1, S=32, O=16]

Answer 1

Answer:

Explanation:

Hi there!

So the given mass is 1.96 g and molecular mass of H2so4 is 98

and we know 2 basic formula to calculate no of moles

(n=no of moles w=given mass m=molecular mass NA=Avargado's number )

n=w/m

n=No of Molecules /NA

Combining both of them

w/m=No of Molecules /NA

Now putting the value

1.96g/98=No of molecules/6.023*10^23

On Cross multiplying

2*10^-2*6.023*10^23=No of molecules

12.046*10^21 = no of molecules

Now no of atoms in a molecule is =No of molecules* No of atom in the compound formula(also known as atomicity)

No of atoms=12.046*10^21* 7

84.322*10^21 atoms approximately

I hope it helps