Question

Ca(s) + O₂(g) + S(s) → CaSO4(s)

Answer 1

The mass of Calcium required to complete this reaction is 4.008 g.

• Law of conservation of mass states that In a closed system, mass cannot be produced or destroyed, but it can be changed from one form to another.
• The mass of the chemical constituents before a chemical reaction is equal to the mass of the constituents after the reaction.
• In several disciplines, including chemistry, mechanics, and fluid dynamics, the idea of mass conservation is widely applied.

In the given reaction mass of product after completion of reaction is 13.614 g that means total mass of constituents before reaction should also be 13.614.

So,

mass of Ca + mass of O₂ + mass of S = mass of CaSO4

Ca + 6.400 g + 3.206 g = 13.614 g

mass of Ca = 13.614 - 9.606 = 4.008 g

Therefore, by law of conservation of mass 4.008 g of Ca is required for the completion of the reaction.

Learn more about mass conservation here:

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