$45.4$ L of dinitrogen reacted with $22.7$ L of dioxygen and $45.4$ L of nitrous oxide was formed. The reaction is given below:
$2N_2\left(g\right)+O_2\left(g\right)\to 2N_{2}O\left(g\right)$
Which law is being obeyed in this experiment?

45.4 L of dinitrogen reacted with 22.7 L of dioxygen and 45.4 L of nitrous oxide was formed. The reaction is given below

$2N_2\left(g\right)+O_2\left(g\right)\to 2N_{2}O\left(g\right)$

Which law is being obeyed in this experiment? write the statement of the law?

The following data are obtained when dinitrogen and dioxygen react together to form different compounds:

Mass of dinitrogen Mass of dioxygen

(i) 14 g 16 g

(ii) 14 g 32 g

(iii) 28 g 32 g

(iv) 28 g 80 g

(a) Which law of chemical combination is obeyed by the above experimental data?Give its statement.

(b) Fill in the blanks in the following conversions:

(i) 1 km = ...................... mm = ...................... pm

(ii) 1 mg = ...................... kg = ...................... ng

(iii) 1 mL = ...................... L = ...................... dm³

What will be the volume (in litres) of oxygen liberated (at STP) when 17 grams of $H_2$$O_2$ decomposed on heating?