posted by jamie .
PH3 has a mass of 17.33 grams, what is the mass in grams of H2 produced?
4 PH3 -> P4 + 6 H2
Add up the numbers to get the molar mass of phosphine, PH3 = 33.998 g/mol
molar mass of hydrogen, H2 = 2.0159
4 mol of PH3 yields 6 mol H2
Mass of Hydrogen
= 1.541 g
Check my calculations.