Question

find the % composition of: KClO3 in Ca(Po4)2​

Answer 1

Answer:

here is your answer

Explanation:

well, first find the Mr using the periodic table, according to the mass number of each element

Ar

Ca = 40

P = 31

O = 16

Mr

40 x 3 + 2 ( 31 + 16 x 4 )

= 120 + 2 ( 31 + 64 )

= 120 + 2 ( 95 )

= 120 + 190

= 310

then to find the percentage composition of each element, use the formula Ar/Mr

Ca : 40 x 3 (because 3 molecules of calcium) = 120

120 / 310 x 100% = 38.71%

P : 31 x 2 (because 2 molecules of phosphorus) = 62

62 / 310 x 100% = 20%

O : 16 x 4 x 2 (because 8 molecules of oxygen) = 128

128 / 310 x 100 % = 41.29%