What is the percentage by weight of calcium in Ca(OCI)2? [Ca = 40, Cl = 35.5, O = 16] By: Sunday|Published on: May 9|Categories: Chemistry WAEC| 0 comments A. 28.0% B. 31.6% C. 43.8% D. 44.5% Correct Answer: Option A A. 28.0% Users Also Read These:200cm³ of 0.50mol/dm³ solution of calcium hydrogen…A sample of wet garden soil of known weigh was…In the electrolytic extraction of calcium from…Calculate the percentage by mass of nitrogen in…A sample of hard water contains some calcium…SEE ALSO The process of extraction of iron from its ore is?