Answer:
Step-by-step explanation:
98 gH 
2
 
 SO 
4
 
 contains1 mole of H 
2
 
 SO 
4
 
 .
1 mole of H 
2
 
 SO 
4
 
 contain=1 mole of sulphur atoms.
∴9.8 g of H 
2
 
 SO 
4
 
 contain =0.1 mol of sulphur atom.
Thus, number of sulphur-atoms =n×N 
A
 
 (in 9.8 g of H 
2
 
 SO 
4
 
 )
=0.1×6.023×10 
23
 =0.6023×10 
23
 .