When 80 g of hydrogen is burned, water is formed in mass.
| July 28, 2021 | education
Given:
m (H2) = 80 g
To find:
m (H2O) =?
Solution:
1) Let’s compose the equation of the chemical reaction, let the water be x g.
2H2 + O2 = 2H2O
2) M (H2) = 1 x 2 = 2, since 2 mol is 4 g / mol.
M (H2O) = 2 + 16 = 18, since 2 mol is 36 g / mol.
3) 80 g: 4 g / mol = x g: 36 g / mol
x = (80 x 36): 4 = 720 g.
Answer: m (H2O) = 720 g.
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