Question

If 250 g of calcium chlorate decomposes into calcium chloride and oxygen, what mass of oxygen would be produced?

____ → ____ + ____

Answer 1

115.95 grams of oxygen

Step-by-step explanation:

The reaction equations is expressed as:

`Ca(ClO_3)_2->CaCl_2+3O_2`

We know the molar mass of
`Ca(ClO_3)_2` as
`206.98\ g/mol` hence the number of moles in the 250g reaction is
`mol=(250)/(206.98)=1.20785 \ mol`

#Given the 1:3 ratio(to oxygen's moles), the number of moles of oxygen produced is:

`O_2=1.20785*3\\\\=3.62354 \ mol`

The molar mass of oxygen is 32g, therefore:

`O_2_g=3.62354* 32\\\\=115.95 \ grams`

Hence, 115.95 grams of oxygen are produced.