MOIN PUB
How many grams of waster are produced in burning 2.24dm of hydrogen at STP?
Answers
Answered by
1
Answer:
You start with 0.1 mole of hydrogen burn it to get water. The formula of water is H2O, So you get 0.1 mole of water. The molecular weight of water is 18. 0.1 mole of water would then weight 1.8 g
There are three rules to solve that kind of problem:
At STP a mole of perfect gas has a volume of 22.4 dm3
A mole is an amount of molecules. It is enough molecules of a substance to get its molecular weight in gram.
Hydrogen can be assumed to be a perfect gas*
So 1 mole of H2 has a volume of 22.4 dm3 at STP. A molecule of hydrogen is made of 2 atomes of hydrogen and thus has a molecular weight of 2. It follows that a mole of H2 has a weight of 2 g.
Explanation:
Similar questions