Ai-bi-ke:
if dats d matter,...den what abt dis
2ClO3^- +12H^+ +12e^-=2Cl^- + 6H2O...does it mean iT is nt correct!....

Ai-bi-ke:
2H2+O2=2H2O ratio of d volumes of d gases

2:1:2
pickin d least value,300cm3 2 multiply tru
we av,
300*2:300*1:300*2
600 : 300 :600
subtract d new vol from d initials
H O
1000 : 300
600:300
we av 400cm3 for hydrogen and Ocm3 for oxygen
soderefor d ans is 400cm3
2 D,...H2S
3 CU^2+ + 2e^-=CU
1 mol of Cu^2+ is deposited by 2*96500c
x mole mole of Cu^2+ is deposited by 360*1/2*96500=1.87*10^-3 moles

great.david:
P1 = 720 mmHg and not 722 mmHg......typographical error

Swagalord18:
remember the charge on 12H⁺ cancels that on 12e^- ...making the LHS net charge = 2^- from the 2ClO₃^-
....the 6H₂O has no charge, ... So the total charge on the RHS is also 2^- from the 2Cl^-
so RHS net charge = LHS net charge ...
Making it correct
i hope you're getting me

Influence01: *just observing *

Ai-bi-ke:
A man stands one-third of d way between two walls and claps his hands. He hears two distinct echoes 1 sec apart,If the speed of sound is 330ms^-1,d distance btween the walls is?

10kgod: Which group 2 element doesn't react with water and reason why?

Which of the following has the largest atomic radius Give reason(s) for your answer...
(a) Nitrogen
(b) Chlorine
(C) Sulphur
(d) Flourine
(e) Oxygen

The hardest substance known next to diamond is______

joseboy199: the substance often use for vulcanization of rubber is....a)chlorine b)hydrogen peroxide c)sulphur d)tetraoxosulphate(vi)acid

Kunlexic: its berylium,but dnt knw d reason.I just knw dat grp 2 elements are sparingly soluble in water.

2.Nitrogen-atomic radius decreases across the period from left to right and increases down the group

3.Diamond

coolguyone: na d i pick

DJMONACO:
Ques: The ratio of the largest to shortest wavelengths in Balmer series of hydrogen spectra is
a. 25/9
b. 17/6
c. 9/5
d. 5/4

PrinceCEE: i think dat this thread has renascent After what seems to be an indefinite extinction.
Lets make here lively and worthy of visitation.

Oga kunle, pls post that OAU chemistry questns here and I'll be happy if u will send OAU pq to me

Kunlexic: my boss,let's try and make it lively den I will try posting a little I can do.I will pm u on ur mail in ur request for the pq(pdf format)

DrLazDevitan:


Got a poor airtime...i pray network dnt put me half-way!
Zn--->Zn^2(OXD)............1
ClO(3)^-1---->Cl^-1(RED).........2
To eqn(2),add a molecule of water to the right side and den balance the
hydrogen by adding a proton ion to the left side of the eqn!..Finally we
shal have
2ClO(3)^-1 + 12H^+ ---> 2Cl^- + 6H(2)O.................(2)
after dat balance the charges of both REDOX EQUATION into dia seprate
half-cell!
Zn ----> Zn^2 + 2e^-...........1
2ClO(3)^-1 + 12H^+1 + 12e^-1 --> 2Cl^-1 + 6H(2)O........2
Using 2e from that of eqn to multiply althrough that of eqn(2)...n
simultaneously use 12e of that of eqn to multiply althrough that of
eqn(1)....:...
let me represent ClO(3)^- as ''A''......H^+ As ''B'' ..........Cl^- as
''M''.......So, if i jump so many steps......we may arrive at
4A + 24B +12Zn => 4M + 12Zn^2+ + 12H(2)O....After dis,then divide through all the right and left side by 4....The final balance equation is

ClO(3)^- + 6H^+ + 3Zn=>Cl^- + 3Zn^2+ + 3H(2)O

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