Question

Hydrochloric acid. is treated with a metal to
produce hydrogen gas. Suppose a student
carries out this reaction and collects a volume of
154.4 x 10- dm of a gas at a pressure of 742 mm
of Hg at a temperature of 298 K. What mass of
hydrogen gas (in mg) did the student collect​

Answer 1

so by doing this Formula answer is coming

12.1mg