What quantity of copper will be deposited by the same quantity of electricity that deposited 9.0g of aluminum? (A = 27, Cu = 64)

Which of the following statements is not true of tin? it

The following are s-block elements except

Given that for the reaction. N2(g) + 3H2(g) ⇌ 2NH3(g) ∆H = 92KJ. What is the enthalpy of formation of ammonia from its elements?

If sulphur is dissolved in carbon (IV) sulphide and the solution is allowed to evaporate, the allotrope of sulphur formed is

What is the voltage of the cell represented at Zn(s) Zn 2+(aq) /Cu2+(aq) /Cu(s) given that for Cu 2+(aq)/ Cu (s) Eo = 0.337V and for Zn2+(aq) /Zn(s)' E o = -0.763V?

The oxidation number of chlorine is + 1 in

50cm\(^3\) of a saturated solution of potassium trioxonitrate (V), KNO\(_3\) at 40\(^{\circ}\)C contained 5.05g of the salt. What is the solubility of KNO\(_3\) at 40\(^{\circ}\)C [K = 39, N = 14, O = 16]

Which of the following is a condition for a spontaneous reaction?

The electronic configuration of two atoms X and Y are as follows: X - 1s 2 2s 22p 63s 1, Y -1s 22s 22p 63s23p 64s 2 which of the statements below is true of the position of X and Y in the Periodic Table?

1989 WAEC SSCE Chemistry Past Questions