Question

if 30cm³ of hydrogen at stp combines with 20cm³ to form steam calculate the total volume of the gaseous mixture with explanation

Answer 1

Answer:

35cm³

Explanation:

Moles of gas and volume of gas are directly proportional. So,

30cm³ of H₂ combines with 15cm³ O₂ to give 30cm³ of H₂O.

And  5cm³ of O₂ remains, so the final gaseous mixture is 35cm³.