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)

Calculate the number of moles in $25.0 \mathrm{g}$ of calcium carbonate, ${\mathrm{CaCO}}_3$. (Write the value upto two decimal places)

Calculate the number of moles in $8.0 \mathrm{g}$ of sodium hydroxide, $\mathrm{NaOH}$. (Write the value upto two decimal places)

Calculate the number of moles in $60 \mathrm{g}$ of glucose, ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$. (Write the value upto two decimal places)

Calculate the mass (in grams) in $0.25 \mathrm{mol}$ of carbon dioxide, ${\mathrm{CO}}_2$. (Give the value rounded-off to the nearest integer)

Calculate the mass (in grams) in $3 \mathrm{mol}$ of ammonia, ${\mathrm{NH}}_3$. (Give the value rounded-off to the nearest integer)

Calculate the mass (in grams) in $0.710 \mathrm{mol}$ of calcium phosphate, ${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2$. (Give the value rounded-off to the nearest integer)

Calculate the mass (in grams) in $0.211 \mathrm{mol}$ of iron(III) oxide, ${\mathrm{Fe}}_2{\mathrm{O}}_3$. (Give the value rounded-off to the nearest integer)