Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

 

Answer

Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water .

This means 1g of Hydrogen reacts with 8g of Oxygen to form H 2 O  

 

1g Hydrogen →  8g Oxygen

3g Hydrogen →  3 × 8g Oxygen

                            = 24g Oxygen


Therefore, 24g Oxygen gas would be required to react completely with 3g of hydrogen gas .

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo