Calculate the molar mass of ${\mathrm{HNO}}_3$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\mathrm{Na}}_2{\mathrm{CO}}_3$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\mathrm{KMnO}}_4$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\mathrm{CaCl}}_2$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of $\mathrm{Al}{\left({\mathrm{NO}}_3\right)}_3$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the molar mass of ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3.7{\mathrm{H}}_2\mathrm{O}$ using the values of ${\mathrm{A}}_{\mathrm{r}}$ found in the periodic table. (Give the value rounded off to the nearest integer)

Calculate the number of moles in $9.8 \mathrm{g}$ of sulfuric acid, ${\mathrm{H}}_2{\mathrm{SO}}_4$. (Write the value upto two decimal places)