Determine the approximate mass of the isotope of carbon in the image.
1 answer:
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Answer:
<h3>The answer is 1.63 %</h3>Explanation:
The percentage error of a certain measurement can be found by using the formula
From the question
actual mass = 9.80 g
error = 9.80 - 9.64 = 0.16
We have
We have the final answer as
<h3>1.63 %</h3>Hope this helps you
Answer:
696 h
Explanation:
Let's consider the reduction of Cr³⁺.
Cr³⁺(aq) + 3e⁻ → Cr(s)
We can establish the following relations.
- The molar mass of Cr is 52.0 g/mol.
- 1 mol of Cr is deposited when 3 moles of e⁻ circulate.
- 1 mole of e⁻ has a charge of 96468 c (Faraday's constant).
- 1 A = 1 c/s
- 1 h = 3600 s
<em>How many hours will it take to plate 13.5 kg of chromium onto the cathode if the current passed through the cell is held constant at 30.0 A?</em>