Question

active mass of 2 mol of nacl kept in 4 litre vessel at ntp is
a)1
b)2
c)1/2
d)not defined
give proper explanaton in detail with steps plzz!

Answer 1

Active mass of solid is always considered as 1..so answer will be 1.because it's a solid

Answer 2

Answer : The correct option is, (C) 1/2

Solution :

Active mass : It is defined as the number of moles present in one liter. Or we can say that the concentration of a reacting substance expressed in moles per liter.

$\text{Active mass of NaCl}=\frac{\text{Moles of NaCl}}{Volume}$

$\text{Active mass of NaCl}=\frac{2mole}{4L}=\frac{1}{2}mole/L$

Therefore, the active mass of 2 mole of NaCl kept in 4 liter vessel at NTP is, $\frac{1}{2}$