by Sunday | Aug 20 | Chemistry WAEC
Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) [Zn = 65; 1 mole of a gas occupies 22.4dm³ at s.t.p] A. 0.040dm³ B. 0.896dm³ C. 5.82dm³ D. 8.62dm³ Correct Answer: Option B – 0.896dm³ Explanation Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) 65g of Zn produces 22.4 dm³ of H2; .:...
by Sunday | Aug 20 | Chemistry WAEC
A. they collide without loss of energy B. they move about in straight lines C. the distances between them are negligible D. the volume occupied by them is negligible Correct Answer: Option A – they collide without loss of...
by Sunday | Aug 20 | Chemistry WAEC
A. mass B. density C. rate of diffusion D. number of molecules Correct Answer: Option D – number of molecules
by Sunday | Aug 20 | Chemistry WAEC
A. wheelbarrow being pushed B. car traveling on a straight line C. Gas molecules colliding in a flask D. Planets going round the sun Correct Answer: Option C – Gas molecules colliding in a flask
by Sunday | Aug 20 | Chemistry WAEC
A. diffusion B. combustion C. absorption D. emission Correct Answer: Option A – diffusion
by Sunday | Aug 20 | Chemistry WAEC
A. 122 B. 101 C. 53 D. 40 Correct Answer: Option D – 40 Explanation One of the mole of M(HCO3)2 = 162g; M +(1 + 12 + 16 x 3) x 2 = 162; M +122 = 162,:. M = 162 – 122 = 40g
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
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