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

Question

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

____ → ____ + ____

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1 year 2021-08-11T14:11:06+00:00 1 Answers 10 views 0

115.95 g

Explanation:

The chemical reaction taking place is expressed as;

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

#Calculate the moles of calcium chlorate in the reaction given a molar mass of $$206.98 \ gmol^{-1}$$:

$$Mass \ Ca(ClO_3)_2=\frac{250\ g}{206.98 \ gmol^{-1}}\\\\=1.2078 \ grams$$

#The ratio of calcium chlorate to oxygen produced is 1:3.

$$O_2 \ Moles=1.2078\times 3\\\\=3.6234\ moles$$

#The molar mass of oxygen is given as 32. We therefore calculate the mass produced as:

$$Mass \ O_2=Molar \ mass(O_2)\times \ moles\\\\=3.6234\times 32\\\\=115.95 \ g$$

Hence, the mass of oxygen produced is 115.95 g