₦airaland Forum

Kunlexic: I=?,m=0.16g,t=15*60secs=900secs
Cu^2+ + 2e-=Cu, 2F liberates 1 mole of copper,2*96500=63.5g
then 0.16g of Cu will be liberated by 193000*0.16/63.5=486coulombs of electricity
from Q=it,where Q=486coulombs,time=900secs,then
486=i*900,i=486/900=0.54A.

mayorall: Not in all cases boss....calculations on electrolysis is in different dimensions....solve with jamb past questions and see the dimensions...different in physics and chemistry

mayorall: The 3 had been input as the order of the reaction (i.e d power)....

mayorall: N2 + 3H3 <===> 2NH3 Dh = -92kjmol^-1

The equilibrium constant for the reaction can be expressed as

A.Kc = 2[NH3]/3[H2] [N2]

B.Kc = [NH3]^2/[N2] [H2]^3

C. Kc = [N2] [H2}^3/{NH3}^2

D. Kc = 3[H2] [N2]/2[NH3]

Kunlexic: This is on electrolysis(Electrochemistry)
1.state the two laws of Michael Faraday on electrolysis
2.Calculate the current that will deposit 0.16g of copper in 15minutes from copper(III)tetraoxosulphate(VI) solution.

mayorall: N2 + 3H3 <===> 2NH3 Dh = -92kjmol^-1

The equilibrium constant for the reaction can be expressed as

A.Kc = 2[NH3]/3[H2] [N2]

B.Kc = [NH3]^2/[N2] [H2]^3

C. Kc = [N2] [H2}^3/{NH3}^2

D. Kc = 3[H2] [N2]/2[NH3]

Kunlexic: This is on electrolysis(Electrochemistry)
1.state the two laws of Michael Faraday on electrolysis
2.Calculate the current that will deposit 0.16g of copper in 15minutes from copper(III)tetraoxosulphate(VI) solution.

zenti99: Please i chose u.i as first and second choice applying for medicine and pharmacy and my waec result is maths B2 english B3 chem B3 physics B3 biology B3 Agric A1 geography A1 Econs A1 and yoruba C5. Pleeese what are my chances! And what mark should my jamb be to confident of been shortlisted

Fynestboi: Hmmmmmm una dn dey plenty well well iyen na gud na guy u re gud to go, just make sure a hit a big blow on ur jamb 270+ and leave odas to God.. Wlcm to the best and success oriented aspirant

mayorall: The link between nervous co-ordination and hormonal co-ordination is

a.cerebrum
b.hypothalamus
c.jugular
d.medull oblongata

Tizzie: MV2/R
M=100,V=5,R=10
100*5*5/10=250rads (not sure)

larri: H C O
6.7/1 40/12 53.3/16
6.7 3.33 3.33(approx)
divide by smallest
1 : 2 : 1
molecular formular (CH2O)=180
(12+1*2+16)n=180
30n=180
n=6
molecular formular=C6H12O6

larri: Which of the following gas law is equivalent to workdone! (A)pressure law (B)van der waals law (C)boyles law (D)charles law.......show full workings of how you arrive @ your answer.....

iamjoseph: Sulphur i guess

Becalina: The maximum speed of electrons emitted from a given metal surace when illuminated by suitable radiation depends on what?

Fynestboi: vague

Johntosyne: [b]161 University Of Ibadan, Ibadan 42,797 506 79 43,382 35,645 531 83 366

shakur07: me sef **off afta d match