Question

The volume of a gas at 0℃ and 700mm pressure is 760cc. The no. of molecules present in this volume is
(1) 1.88 × 10^22
(2) 6.022 × 10^23
(3) 18.8 × 10^23
(4) 18.8 × 10^22

Answer 1

6.022×10^23 the no. of molecules present

Answer 2

hey mate!......


◇ given.....

PV=700mm,RT=760cc

□ we know ......

ideal gas eqn is...


▪ PV = nRT

▪n = PV/RT

▪n = 700/760 atm × 760×10^-3 L / (0.0821 L atm / mol K ×273 K.

▪n =0.03 mol

▪ n = 0.03×6.022×10^23 molecules

▪n= 1.88×10^22 molecules.

● may be the option "1" is correct.


hope it helps u dear......