Question

number of moles in 25 grams of calcium oxide​

Answer 1

Answer:

0.25 moles

= 0.25 moles. thus number of moles in 25 g of calcium oxide is 0.25.

Answer 2

Answer:

ANSWER

The reaction is CaCO3⇌CaO+CO2.

One mole of calcium carbonate on decomposition gives one mole of calcium oxide.

The molecular weight of calcium carbonate and calcium oxide are 100 g/mol and 56 g/mol respectively. 

The decomposition of 100 g of calcium carbonate will give 56 g of calcium oxide.

Hence, the decomposition of 25 g of calcium carbonate will give 14 g of calcium oxide (quicklime).