Question

. Volume of a gas at STP is 1.12 x 10-7cc. Calculate the number of molecules in it
(1) 3.01 X 1020
(2) 3.01 x 1012
(3) 3.01 x 1023
(4) 3.01 X 1024​

Answer 1

Answer:(2)3.01×10¹² is the answer.

Explanation:

HI,

NO OF MOLES =VOLUME/22400cc=no of molecules/avagadro number

==>1.12×10⁻⁷/22400cc=no of molecules/6.023×10²³

==>SO NUMBER OF MOLECULES=1.12×10⁻⁷×6.023×10²³/22400cc=3.01×10¹²

so answer is NUMBER OF MOLECULES=3.01×10¹².

HOPE YOU UNDERSTOOD.............

THANK YOU.