Ammonia may be oxidised to nitrogen monoxide in the presence of a catalyst according to the following equation.

$4{\mathrm{NH}}_3+5{\mathrm{O}}_2\to 4\mathrm{NO}+6{\mathrm{H}}_2\mathrm{O}$

If $27$ litres of reactants are consumed. What volume of nitrogen monoxide is produced at the same temperature and pressure?

What volume of air (containing $20\%{\mathrm{O}}_2$ by volume) will be required to burn completely $10 {\mathrm{cm}}^3$ each of methane and acetylene.

${\mathrm{CH}}_4+2{\mathrm{O}}_2\to {\mathrm{CO}}_2+2{\mathrm{H}}_2\mathrm{O}$

$2{\mathrm{C}}_2{\mathrm{H}}_2+5{\mathrm{O}}_2\to 4{\mathrm{CO}}_2+2{\mathrm{H}}_2\mathrm{O}$

LPG has $60\%$ propane and $40\%$butane : $10$ litres of this mixture is burnt. Calculate the volume of carbon dioxide added to atmosphere. 

${\mathrm{C}}_3{\mathrm{H}}_8+5{\mathrm{O}}_2\to 3{\mathrm{CO}}_2+4{\mathrm{H}}_2\mathrm{O}$

$2{\mathrm{C}}_4{\mathrm{H}}_{10}+13{\mathrm{O}}_2\to 8{\mathrm{CO}}_2+10{\mathrm{H}}_2\mathrm{O}$

$2{\mathrm{C}}_2{\mathrm{H}}_2\left(\mathrm{g}\right)+5{\mathrm{O}}_2\left(\mathrm{g}\right)\to 4{\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$

The gases chlorine, nitrogen, ammonia and sulphur dioxide are collected under the same conditions of temperature and pressure. The following table gives the volumes of gases collected and the number of molecules $\left(\mathrm{x}\right)$ in $20$ litres of nitrogen. You are to complete the table giving the number of molecules in the other gases in terms of $\mathrm{x}$.

If $150 \mathrm{cc}$ of gas A contains $\mathrm{X}$ molecules, how many molecules of gas $\mathrm{B}$ will be present in $75 \mathrm{cc}$ of $\mathrm{B}$? The gases $\mathrm{A}$ and $\mathrm{B}$ are under the same conditions of temperature and pressure. Name the law on which the problem is based.