Question

The number of molecules in 89.6 litre of a gas at STP are

(A)6.02 X 1023
(B)2 X 6.02X 1023
(C)3 X 6.02X 1023
(D)4 X 6.02X 1023

Answer 1

No.of moles at STP=given volume/molar volume
Moles=89.6l/22.4l=4moles.
1 mole=6.02*10^23 molecules
So,4moles =4*6.02*10^23 molecules
So option 4 is correct.

PS:please mark as BRAINLIEST please!!!!!

Answer 2

Given:

89.6 litre of gas at STP.

To find:

We have to find the number of molecules.

Solution:

To determine the number of molecules we have to follow the below steps as follows-

We can write-

At STP 22.4 litres of gas has $6.022×10^{23}$ number of molecules.

At STP 89.6 litres of gas has $6.022×10^{23}×89.6/22.4=24.088×10^{23}$ number of molecules.

Thus at STP 89.6 litres of gas has $4×6.022×10^{23}$ number of molecules.

Hence the correct option is D.