Question

Express into moles 34.7 gram of sulphuric acid , 3.15 gram of nitric acid​

Answer 1

0.354 moles of $H_{2}SO_{4}$ and $0.0499 mol$ $HNO_{3}$

Explanation:

Moles = (gram of substance)/(molecular weight of substance)

Molecular masses of elements are

H=1

O=16

S=32

N=14

molecular weight of $H_{2}SO_{4}$  $=2\times 1+32+4\times 16$

                                             $=98gm/mol$

molecular weight of $HNO_{3}$ $=1+14+3\times 16$

                                             $=63gm/mol$

so, moles of $H_{2}SO_{4}$ $=\frac{34.7g}{98g/mol}$

                                $=0.354 mol$

moles of $HNO_{3}$$=\frac{3.15g}{63g/mol}$

                         $=0.0499 mol$

so 0.354 moles of $H_{2}SO_{4}$ and  $0.0499 mol$ of $HNO_{3}$