Question

X has 5 grams of Nitrogen in a container and y has the same amount of oxygen in another container then which container is heavier and why and also calculate the number of molecules in each container

Answer 1

Answer:

Container Y having Oxygen gas is heavier.

Explanation:

Given;

Container X has 5 grams of N₂ gas

Number of moles = given weight / molecular weight

= 5/28

= 0.178 moles of N₂

Also it is said that Container Y also has the same amount of O₂ which is 0.178 moles.

So, the weight of O₂ =  moles x molecular weight

= 0.178 x 32

= 5.696 grams

So, clearly container Y having Oxygen gas is heavier.

Number of molecules = 0.178 x Avogadro number

= 0.178 x 6.022 x 10²³

= 1.072 x 10²³ molecules

NOTE: Number of molecules is the same in both the containers as the number of moles are also same.

So, Container X has 1.072 x 10²³ molecules of N₂ and container Y has 1.072 x 10²³ molecules of O₂.

Hope it helps!