Chemistry

Problem

At room temperature,

\text{NH}_3

gas at 1 atm and

\text{HCl}

gas at

P

atm are allowed to effuse through identical pinholes from opposite ends of a glass tube of 1 metre length and of uniform cross-section.

\text{NH}_4\text{Cl}

is first formed at a distance of 60 cm from the end through which

\text{HCl}

gas is sent in. What is the value of

P