Answer:
Mass of hydrogen = 2 g
Explanation:
Given data:
Mass of water = 18 g
Mass of hydrogen react = ?
Solution:
First of all we will write the balance chemical equation,
2H₂ + O₂ → 2H₂O
Number of moles of water = mass / molar mass
Number of moles of water = 18 g/ 18 g/mol
Number of moles of water = 1 mol
Now we compare the moles of water and hydrogen from balance chemical equation.
H₂ : H₂O
2 : 2
1 : 1
Mass of hydrogen = number of moles / molar mass
Mass of hydrogen = 1 mol × 2 g/mol
Mass of hydrogen = 2 g
