Question

Quicklime contains 28.6% of oxygen by weight. Determine the weight of oxygen in 750gram quicklime.

Answer 1

Answer:

214.5 gm

Explanation:CaO = 40+16=56

28.6% Oxy

weight of oxy present be X

X/56×100 = 28.6

X= 28.6×56/100

X=16.06

now, 56 gm CaO contain 16 gm oxygen

therefore 750 gm will contain let be Y

56:16

750:Y

Y=16×750/56= 214.5 gm