Answer: b
Explanation: 50% comes from one parent and 50% comes from the other
Answer:
a)Anode-Zinc
Cathode - Iron
b) At the anode;
Zn(s) -----> Zn^+(aq) + 2e
At the cathode;
Zn^+(aq) + 2e -----> Zn(s)
c) ZnSO4
d) The electrode which is connected to the positive post of the battery is the anode.
The electrode which is connected to the negative post of the battery is the cathode.
Explanation:
Electroplating is an electrolytic process in which a metal is used to cover the surface of another metal. The plating substance is the anode while the plated substance is the cathode. The electrolyte is a salt of the plating metal.
The anode of an electrolytic cell must be maintained at a positive potential with respect to the cathode hence it is connected to the positive terminal of the battery. The cathode must be maintained at a negative potential hence it is connected to the negative terminal of the battery.
Answer
is: Ksp for AB₂ is 2.06·10⁻¹⁰.<span>
Chemical reaction: AB</span>₂(s) → Aˣ⁺(aq) + 2Bⁿ⁻(aq).
<span>
s(AB</span><span>₂) =
3,72·10⁻⁴ M.</span><span>
s(AB</span>₂) =
s(Aˣ⁺).
s(Bⁿ⁻) =
2s(AB₂).
Ksp(AB₂) = s(Aˣ⁺) ·
(s(Bⁿ⁻))².<span>
Ksp</span>(AB₂) = 3,72·10⁻⁴ ·
(7,44·10⁻⁴)².
Ksp(AB₂)= 2,06·10⁻¹⁰.
Answer:
Explanation:
The first two answers are the correct ones. Sometimes C can be true, but it is not a condition. Some equations produce many more products than reactants and some equations are made from more reactants than products.
The last one is normally not true, but the three equations I choose below do give D to be true. Still it does not happen all the time.
C8H18 + 12.5 O2 ===> 8CO2 + 9H20 This is the combustion equation that drives your engine. The coefficients do not add.
Same number of reactants as products.
CH4 + 2O2 ==> CO2 + 2H2O
More products than reactants.
Cu + 4HNO3 ==> Cu(NO3)2 + 2NO2 + 2H2O
More Reactants than products.
H2 + I2 ==> 2HI
Answer: C5H14N2
Explanation:
The element mass are:
C = 58.77 g
H = 13.81 g
N = 27.42 g
To get their moles, we have to divide by the molar mass which will be:
C: 58.77 / 12.01 = 4.8934
H: 13.81 / 1.008 = 13.7004
N: 27.42 / 14.01 = 1.9572
We then divide by the smallest mole which will be:
C: 4.8934 / 1.9572 = 2.5
H: 13.7004 / 1.9572 = 7
N: 1.9572 / 1.9572 = 1
We then multiply by 2 so that we can get whole number ratio:
C: 2.5 × 2 = 5
H: 7 × 2 = 14
N: 1 × 2 = 2
Therefore, the empirical formula will be = C5H14N2