Question

bones contain a complex mixture of ca salts protein and other molecules.when ola bone is strongly heated in a current of air,the only residue is calcium oxide.from a sample of 50.0g of bone,14.0g of calcium oxide were obtained .what is the %age by mass of Ca in the bone​

Answer 1

Answer:

If 56 gms of calcium oxide(CaO) contains 40 gms of calcium, then one gram of calcium oxide contains 40/56 gms of calcium .So 14 gms of calcium oxide contains 14×40/56=> 560/56 => 10 gms of calcium. hence %by mass of calcium in the bone = 10/50 ×100 =1000/50 =20% . Hope this helps you... Mark me as Brainliest if you think i am worthy of it.