Answer:
Option 8. 123.192g
Step-by-step explanation:
From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules. Therefore 1mole of H2 contains 6.02x10^23 molecules.
1mole of H2 = 2x1 = 2g
If 1 mole(i.e 2g) of H2 contains 6.02x10^23 molecules,
Then Xg of H2 will contain 4.12 × 10^24 molecules i.e
Xg of H2 =
(2x4.12 × 10^24)/6.02x10^23 = 13.688g.
Now let us generate a balanced equation for the reaction between of Hydrogen to produce water:
2H2+ O2 —> 2H2O
Molar Mass of H2 =2g/mol
Mass of H2 from the balanced equation = 2 x 2 = 4g
Molar Mass of H20 = (2x1) + 16 = 18g/mol
Mass of H2O from the balanced equation = 2 x 18 = 36g.
From the equation,
4g of H2 produced 36g of H2O.
Therefore, 13.688g of H2 will produce = (13.688x36)/4 = 123.192g of H2O