The half-reaction at the cathode in an electrochemical cell is given below.
1 answer:
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Answer:
<h2>15 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
But from the question
volume = final volume of water - initial volume of water
volume = 165 - 150 = 15 mL
We have
We have the final answer as
<h3>15 g/mL</h3>Hope this helps you
Answer: 1.35x 10²³ molecules FeCl3
Explanation: First find the number of moles for FeCl3 using its molar mass which is equal to 162.2 g FeCl3
Convert moles of FeCl3 to molecules by using the Avogadro's number.
Answer: The correct answer is Option C.
Explanation:
We are given a piston of a pump, which means that there is no loss of the air. and there is a change in pressure and volume but temperature of the system remains constant.
As, the pressure of the system increases, there will be more number of particles. So, the number of collisions per unit area will increase.
But in the question, volume gets doubled. So, the pressure will be determined by using Boyle's Law:
where, are the initial and final volume respectively.
Putting the change in volume in above equation, we get:
where, are the initial and final pressure respectively.
As, the pressure is reduced to half of the initial pressure. So, the number of collisions per unit area will also be reduced to one-half.
Hence, the correct answer is Option C.