Question

Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen gas (O2) according to the following equation.

2H2O= 2H2 + O2

The molar mass of H2O is 18.01 g/mol. The molar mass of O2 is 32.00 g/mol. What mass of H2O, in grams, must react to produce 50.00 g of O2?
14.07
23.05
28.14
56.28

Answer 1

@Abmon98

Answer 2

is it 23.05

Answer 3

nope your given a know mass of oxygen which is 50 grams
Number of moles=mas/molar mass
50/32=1.5625 moles of oxygen
look for the mole ratio of H2O to O2
which is 2:1
1.5625*2/1=3.125 moles of H2O
3.125*18=Mass

Answer 4

so 56.28 ?

Answer 5

is that my answer