Question

How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)​

Answer 1

Answer:

0.144 moles

Explanation:

• The relationship between mass of a compound, number of moles and molar mass of the compound is given by;
• Number of moles = Mass ÷ Molar mass
• Molar mass is equivalent to the relative formula mass of the compound that is calculated the atomic masses of the elements making the compound.

In this case;

Our compound, KClO3 will have a molar mass of;

= 39 + 35.5 + 4(16)

= 138.5 g/mol

Mass of KClO3 is 20 g

Therefore;

Number of moles = 20 g ÷ 138.5 g/mol

                            = 0.144 moles

Thus, the number of moles in 20 g of KClO3 is 0.144 moles