increase the surface area of the reactants
increase the concntration of the reactants
lower the activation energy for the reactio
lower the heat of reaction, ∆H, for the reaction
Correct answer is C
As a catalyst, MnO2 lowers activation energy of a reaction.
2H2S(g) + SO2(g) → 3S(s) + 2H2O(I). The above reaction is?
a redox reaction H2S is the oxidant and SO2 is the reductant
a redox reaction in which SO2 is the oxidant and H2S is the reductant
not a redox reaction because there is no oxidant in reaction equation
not a redox because there is no reductant in the reaction equation
Correct answer is B
In the above reaction, H\(_2\)S is oxidized to H\(_2\)O while SO\(_2\) is reduced to S. Hence, H\(_2\)S is the reductant while SO\(_2\) is the oxidant.
MnO-4 + 8H+ + ne → Mn++ + 4H2O. Which is the value of n in the reaction above?
2
3
4
5
Correct answer is D
MnO-4 + 8H+ + ne- → Mn++ + 4H2O
Since Mn has 7 electrons on one side and 2 electrons on the other side. The value of ne- is 5.
FeCI 3 and NH 4CI
Na2CO3, CH3COONa and Na,Na2SO4
Na2CO3 and CH3COONa
FeCI3, CH3COONa and NH4CI
Correct answer is C
No explanation has been provided for this answer.
1
2
3
4
Correct answer is B
Q = It = 1.5 x 4 x 60 x 60
13.3 g = 216000 C
118.7 g = (216000 x118.7) / (13.3) = 1927759.4 C
06500 C - 1 mole
1927759.4 C = (1927759.4) / (96500) = 1.998 = 2