2007MnO2(s) + xHCl(aq) → MnCl2(aq) + yH2O(l) + zCl2(g)In theequation above, what are the values of x, y and z respectivelySee more
2007If the electron configuration of a element is p1s2 2s2 2P5, how many unpaired electron are there?See more
2007A metal X forms two bromides with the formulae XBr2 and XBr3. What type of bonding exists between X and bromine in the bromide?See more
2007When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit ofSee more