Chemistry
Grade-9
Easy
Question
From the above equation find the amount of copper oxide when it reacts with 2.80Litres of Hydrogen at normal temperature and pressure is:
- 9.95 g
- 0.95 g
- 9.5 g
- 10.5 g
Hint:
79.5 g of CuO reacts with 22.4L of hydrogen.
The correct answer is: 9.95 g
CuO + H2 
Cu + H2O
1 mole of CuO reacts with 22.4L of hydrogen.
79.5 g of CuO reacts with 22.4L of hydrogen.
2.8L of hydrogen gives 9.95 gm of copper oxide.
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