1989
What quantity of copper will be deposited by the same quantity of electricity that deposited 9.0g of aluminum? (A = 27, Cu = 64)
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1989 WAEC SSCE Chemistry Past Questions
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1989
Which of the following statements is not true of tin? it
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1989
The following are s-block elements except
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1989
Given that for the reaction. N2(g) + 3H2(g) ⇌ 2NH3(g) ∆H = 92KJ. What is the enthalpy of formation of ammonia from its elements?
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1989
If sulphur is dissolved in carbon (IV) sulphide and the solution is allowed to evaporate, the allotrope of sulphur formed is
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1989
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?
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1989
The oxidation number of chlorine is + 1 in
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1989
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]
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1989
Which of the following is a condition for a spontaneous reaction?
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1989
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?
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