Question

the active mass of 7g of nitrogen in a 2 litre container would be

Answer 1

the answer is 0.125

active mass is Molarity

first we will find the no of moles=7/28

then we will multiply no. of moles to 1000 and divide it by 2000

we will get the answer.

Answer 2

Active mass is the concentration of the compound per unit volume in a liter or active mass can be determined exactly in the way to calculate concentration per unit volume of solute.

n = m /M

n = 7 /28

= 0.25 mol

where n is Moles of N2

m is mass of N2

M is molar mass

Active mass= conc. In mol/L

                    =0.25 mol/2L

                    =0.125mol/L