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Roman55 [17]
3 years ago
6

Will a marble keep rolling forever on a flat hardwood floor?

Chemistry
1 answer:
Oliga [24]3 years ago
4 0
No because friction will sllooow ittttttttt ddooooooooooooooowwwwwwwwn
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A concentration cell is constructed using two NI electrodes with Ni2 concentration of 1. 0 m and 1. 0 x 10^-4 m in the two half-
Crank

The potential of the concentration cell is 0.1182 V when the reaction is spontaneous.

<h3>What is Concentration Cell?</h3>

An electrolytic cell that contains two half cells with the same electrodes but with different concentrations is known as a concentration cell.

<h3>What is Nernst Equation?</h3>

Nernst Equation helps in determining the cell potential under the non-standard conditions that are at any known temperature, pressure, and concentration. It is given by

E = E^o - \frac{2.303RT}{F} log Q

At T = 298 K,

E = E^o - \frac{0.0591}{n} logQ

For Ni concentration cell, anode and cathode are the same and thus E° is zero

At anode,

Ni (s)\rightarrow Ni^2^+ + 2e^-

At Cathode,

Ni^2^+ + 2e^-\rightarrow Ni (s)

No of moles of electrons, n = 2

Then, the potential of the cell is given by

E=- \frac{0.0591}{n} logQ

Q = \frac{[diluted Ni]}{[concentrated Ni]}

diluted Ni = 1 x 10⁻⁴ M and concentrated Ni = 1 M

E = \frac{-0.059}{2} log\frac{ 10^-^4}{1}\\   = \frac{-0.059}{2} \times -4 log10

log(10) = 1

E = 0.1182 V

Hence, the potential of the cell is 0.1182 V.

Learn more about the Nernst equation:

brainly.com/question/15237843

#SPJ4

6 0
2 years ago
a mixture is made by combining 1.64 lb of salt and 4.66 lb of water. what is the percentage of salt (by mass) in this mixture?
const2013 [10]
1.64 + 4.66 = 6.3
1.64/6.3 = 0.2603174603 = 26% 
5 0
3 years ago
Read 2 more answers
The difference between Physical/Chemical properties and Physical/Chemical changes
AfilCa [17]
Physical changes can be reversed and chemical changes can’t be reversed. A physical property is a characteristic which can be identified without changing the substance but to identify a chemical property, you do have to change the substance.
6 0
3 years ago
PROBLEMS
allsm [11]

Answer:

% Mass of sand = 35.95%

% Mass of KBr = 64.05%

Explanation:

From the question given, we obtained the following:

Mass of mixture( KBr + sand) = 10g

Mass of sand = 3.595g

Mass of KBr = 10 — 3.595 = 6.405g

% Mass of sand = ( Mass of sand / mass of mixture) x 100

% Mass of sand = (3.595 / 10) x100

% Mass of sand = 35.95%

We can obtain the percentage of KBr by subtracting the percentage of sand from 100. This is illustrated below:

% Mass of KBr = 100 — 35.95

% Mass of KBr = 64.05%

4 0
3 years ago
What type of heat transfer will occur between the heated water in a heated pool and yourself?
coldgirl [10]
Correct answer is conduction, A
5 0
3 years ago
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