The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40...
The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40.0; CI = 35.5; O = 16.0]
28.0%
31.6%
43.8%
44.5%
Correct answer is A
Molar mass of Ca(OCl)2 = 40 + (16 + 35.5)x2 = 143
% by mass of calcium in the compound =massofcalcuimmolarmassofcompound x 100%
% calcium = 40143×100
= 27.98% = 28%
By what amount must the temperature of 200cm3 of Nitrogen at 27°C be increased to double th...
Which of the following changes is characteristic of an alpha-particle emission? ...
Which of the following substances could be responsible for the banana taste of a food flavour? ...
PCl5(g) ↔ PCl3(g) + Cl2(g) In the reaction above, a decrease in pressure will...
When ethanol is heated with excess concentrated sulphuric acid, the ethanol is? ...
Chlorine gas turns a damp starch-iodide paper ...