Answer: true
Explanation:
In chemical reactions, an energy barrier exists between reactants and products. The magnitude of this energy barrier determines the rate of reaction. A lesser energy barrier implies that reactants are converted to products faster since the energy required is not too much. On the other hand, a large energy difference between reactants and products will lead to a slow reaction with very poor yield of products if any.
17000mg I think I hope this help
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Answer:
8.82 gm of Pb
Explanation:
Question
calculate the Mass of lead that will be deposited from an aqueous solution of lead(2)salt by the same quantity of electricity that deposit 2.7 g of copper from an aqueous solution of copper (2)saltSince the oxidation# of the Pb and the Cu is the same, we know that the same amount of electricity that will deposit 1 mole of Cu will deposit 1 mole of Pb
2.7 gm of Cu were deposited
the atomic mass of Cu = 63.5
the number of moles of Cu deposited was 2.7/63.5 = 0.0425 moles
so 0.0425 moles of Pb will be deposited.
The atomic mas of Pb is 207.2
0.0425 mole of Pb weigh 0.0425 X 207.2 =
8.82 gm of Pb
Answer:
The answer is
![\huge 4\%](https://tex.z-dn.net/?f=%20%5Chuge%204%5C%25)
Explanation:
The percentage error of a certain measurement can be found by using the formula
![P(\%) = \frac{error}{actual \: \: number} \times 100\% \\](https://tex.z-dn.net/?f=P%28%5C%25%29%20%3D%20%20%5Cfrac%7Berror%7D%7Bactual%20%5C%3A%20%20%5C%3A%20number%7D%20%20%5Ctimes%20100%5C%25%20%5C%5C%20)
From the question
actual mass = 6.25 g
error = 6.25 - 6 = 0.25
So we have
![p(\%) = \frac{0.25}{6.25} \times 100](https://tex.z-dn.net/?f=p%28%5C%25%29%20%3D%20%20%5Cfrac%7B0.25%7D%7B6.25%7D%20%20%5Ctimes%20100)
We have the final answer as
<h3>4 %</h3>
Hope this helps you