Chemistry Past Questions and Answers

If a current of 1.5 A is passed for 4.00 hours through a molten tin salt and 13.3g of tin is deposited, what is the oxidation state of the metal in the salt?<br/>(Sn = 118.7, F = 96500 C mol<sup style='font-size: smaller;'>-1</sup>)

Which of the following equimolar solutions, Na<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3</sub> Na<sub style='font-size: smaller;'>2</sub> SO<sub style='font-size: smaller;'>4</sub>CI FeCI<sub style='font-size: smaller;'>3</sub> CH<sub style='font-size: smaller;'>3</sub>COONa, <br/>have pH greater than 7?

MnO<sup style='font-size: smaller;'>-</sup><sub style='font-size: smaller;'>4</sub> + 8H<sup style='font-size: smaller;'>+</sup> + ne → Mn<sup style='font-size: smaller;'>++</sup> + 4H<sub style='font-size: smaller;'>2</sub>O. Which is the value of n in the reaction above?

2H2S(g) + SO2(g) → 3S(s) + 2H2O(I). The above reaction is?

Magnesium (IV) oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to?