# Magnesium and Oxygen Combine in the Ratio of 3 : 2 by Mass to Form Magnesium Oxide. What Mass of Oxygen Gas Would Be Required to React Completely with - Science

Short Note

Magnesium and oxygen combine in the ratio of 3 : 2 by mass to form magnesium oxide. What mass of oxygen gas would be required to react completely with 24 g of magnesium ?

#### Solution

Magnesium reacts with oxygen in the ratio of 3:2 to form magnesium oxide.

The above relation states that magnesium and oxygen combine in a fixed ratio of 3:2 by mass.

Therefore, 3g of magnesium react with 2g of oxygen to form magnesium oxide.

1g of magnesium requires = 2/3g of oxygen = 0.66g of oxygen

24g of magnesium require = 24 × 0.66g of oxygen = 16g

16g of oxygen would be required to react completely with 24g of magnesium.

Concept: Ions (Radicals) and Its Types
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#### APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Hots Questions | Q 78 | Page 131