Question 2 Page 33 - Chapter 3 Class 9 - Atoms And Molecules

Last updated at April 16, 2024 by

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 .

Reaction of hydrogen and oxygen to water.png

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