14.29%
25.39%
50.79%
59.25%
Correct answer is D
Al2(SO4)3. 2H2O
2 * 27 + 3*32 + 14 * 16 + 4 * 1 =
54 + 96 + 224 + 4 = 378
% O2 = (224/378) * (100/1) = 59.25%
Transition metals possess variable oxidation states because they have ...
Which of the following statements about an electrochemical cell is correct? Oxidation occurs ...
The pOH of a solution of 0.25 mol dm-3 of hydrochloric acid is...
What is the atomic number of Nobelium? ...
The energy value of petrol can be determined by a ...
What change will occur during the electrolysis of brine using carbon electrodes? ...
A major effect of oil pollution in coastal waters is the? ...