Question

What weight of ammonia contains the same number of molecules as 11.2litre of oxygen at stp

Answer 1

Answer:

8.5 g

Explanation:

Since 11.2 litres of O*2 gas contain half mole ,I.e., N/2 molecules, hence half mole of NH*3 will weigh=mol. wt./2 =17/2 g = 8.5g

Answer 2

8.5-gram ammonia contains the same number of molecules as 11.2litre of oxygen at STP.

Given,

11.2 litre of oxygen at STP.

To Find,

The weight of ammonia contains the same number of molecules as 11.2litre of oxygen at step.

Solution,

We can interpret this type of problem by the subsequent technique.

Now,

11.2-litre oxygen contains N/2 molecule hence half a mole of ammonia will weigh.

22.4 L of ammonia at STP has a mass = of 17 grams.

11.2 L of ammonia at STP has mass

$= \frac{17}{2}$

= 8.5 gram

Hence, 8.5-gram ammonia contains the same number of molecules as 11.2litre of oxygen at STP.