The relation between gram molecular mass and gram molecular volume is established by Avogadro's law. Explain.

Mention the factors on which the rate of diffusion of gases depends. Why are similar conditions of temperature and pressure necessary?

How do gases differ from solids and liquids?

Explain the statement "Gases have neither a fixed shape nor a fixed volume."

Empirical formula of a compound is $\mathrm{C}_2 \mathrm{H}_4 \mathrm{O}$. If its empirical formula weight is equal to its vapor density, calculate the molecular formula of the compound.

State Graham's law of diffusion.

For the following reactions, identify the products formed and balance the equations:\

$$\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3+\mathrm{NaOH} \rightarrow$$

For the following reactions, identify the products formed and balance the equations:\

$$\mathrm{HNO}_3+\mathrm{CaCO}_3 \rightarrow$$

For the following reactions, identify the products formed and balance the equations:\

$$\mathrm{MnO}_2+\mathrm{HCl} \rightarrow$$

For the following reactions, identify the products formed and balance the equations:\

$$\mathrm{S}+\mathrm{HNO}_3 \rightarrow$$

For the following reactions, identify the products formed and balance the equations:\

$$\mathrm{Na}_2 \mathrm{O}_2+\mathrm{H}_2 \mathrm{O} \rightarrow$$

Balance the chemical equations:\

$$\mathrm{SO}_2+\mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{S}$$

Balance the chemical equations:\

$$\mathrm{NaBr}+\mathrm{H}_3 \mathrm{PO}_4 \rightarrow \mathrm{Na}_3 \mathrm{PO}_4+\mathrm{HBr}$$

Balance the chemical equations:\

$$\mathrm{KI}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{K}_2 \mathrm{SO}_4+\mathrm{SO}_2+\mathrm{I}_2+\mathrm{H}_2 \mathrm{O}$$