determine the number of grams of 562L of H2 at stp

Answer 1

At STP, we know that any molecule is at 22.4 L / mol of that molecule. So, we can conduct a unit dimensional analysis for this problem to determine the number of grams:

562 L H2 x (mol/22.4L) x (2.02 g / mol H2) = 50.68 g H2

We have to divide by 22.4 L to cancel the L units. We also know that the molar mass of H2 is 2.02 g/mol. So we multiply by that number to convert the final answer to grams (stated in the problem statement).

The final answer we get is 50.68 g H2. Hope this helps!