How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 2h2 + o2 → 2h2o

Hey there!:

Molar mass:

H2 = 2.01 g/mol    ;    H2O = 18.01

Given the reaction:

2 H2 + O2 = 2 H2O

2 * (2.01 ) g H2 2 * ( 18.01 ) g H2O

mass H2 1.80 g H2O

mass H2 = 1.80 * 2 * 2.01 / 2* 18.01

mass H2 = 7.236 / 36.02

mass H2 = 0.2008 g

Hope that helps!

the answer is c i took the test