Question

Calculate the mass of 112 centimeter cube of hydrogen at STP

Answer 1

At STP 22400 cm3 contains 16 g of CH4 
so 112 cm3 will contain = (112×16)/22400
= 0.08g

Answer 2

HEY MATE UR ANSWER

112 cm³ = 112 ml

= 0.112 l = 0.112/22.4 mol

= 5*10^-3 mol = 5*10^-3*2.016 g

= 0.01 g

HOPE THIS HELP U