Answer:
Mass of oxygen react = 32 g
Explanation:
Given data:
Mass of hydrogen = 20 g
Mass of oxygen = ?
Mass of water formed = 36 g
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Number of moles of water formed:
Number of moles = mass/molar mass
Number of moles = 36 g/ 18 g/mol
Number of moles = 2 mol
No we will compare the moles of water with oxygen.
H₂O : O₂
2 : 1
when two moles of water formed one mole of oxygen react.
Mass of oxygen react:
Mass = number of moles × molar mass
Mass = 1 mol × 32 g/mol
Mass = 32 g
