Temperature of an ideal gas is T K and average kinetic energy is E =

1.	Temperature of an ideal gas is T K and average kinetic energy is E = 2.07 x 10-23 T Joule/molecule. Number of molecules in 1 litre gas at S.T.P. will be(a) 2.68 x 1022 (b) 2.68 x 1025(c) 2.68 x 1028 (d) 1.68 x 1022
Answer» Correct Option (a) 2.68 x 10²² Explanation: As we know that at S.T.P. 22.4 litre of gas contains 6.023 x 10²³ molecules 1 litre of gas contain 6.023 x 10²³/22.4 = 2.68 x 10²²molecules.

Temperature of an ideal gas is T K and average kinetic energy is E = 2.07 x 10-23 T Joule/molecule. Number of molecules in 1 litre gas at S.T.P. will be(a) 2.68 x 1022 (b) 2.68 x 1025(c) 2.68 x 1028 (d) 1.68 x 1022

Answer»

Correct Option (a) 2.68 x 10²²

Explanation:

As we know that at S.T.P. 22.4 litre of gas contains 6.023 x 10²³ molecules

1 litre of gas contain 6.023 x 10²³/22.4 = 2.68 x 10²²molecules.