Answer:
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Explanation:
Answer:
Equation 2, because Fe is being more reactive, replaces Cu from CuSO₄.
Explanation:
- Equation 1 is: <em>CuSO₄ + 2NaOH → Na₂SO₄ + Cu(OH)₂.</em>
The reaction between CuSO₄ and NaOH will give Na₂SO₄ and Cu(OH)₂ which is a precipitate "replacement reaction".
- While, equation 2 is: <em>CuSO₄ + Fe → Cu + FeSO₄.</em>
The reaction between CuSO₄ and Fe will produce Cu and FeSO₄.
Thus, it is used to extract Cu because Fe is more reactive than Cu, so it can replace it in its salts and Cu can be extracted.
- <em>So, the right choice is: Equation 2, because Fe is being more reactive, replaces Cu from CuSO₄.</em>
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The Diprotodon apparently become extinct <u>20,000 years</u> ago.
<h3>Briefly explained</h3>
This question is in reference to the use of carbon 14 dating. We know the specific activity of a Australian marsupial. Based on the carbon 14 present. It's .61 PICO curie program. Modern carbon has a specific activity of 6.89 PICO curie program. So all we need to do then is use the first order integrated rate law to solve for the time that has elapsed with Both of these activities as part of the equation.
But before we can do that we need the decay constant for carbon 14, which we can get by dividing the half life Of carbon 14 into natural log of two. And we get 1.21 times 10 to give 14, 1 over years. So using the first order integrated rate law, the natural log of the activity at time, T divided by the activity Um at time zero represented by present day Will be equal to negative K. multiplied by T.
Little Algebraic rearrangement gives us an age of 20,000 years.
Learn more about decay
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Copper reacts with Nitrogen to produce Copper Nitride
6 Cu + N₂ → 2 Cu₃N
At S.T.P
22.4 L (1mole) of N₂ reacts with = 381.24 g of Cu to produce Cu₃N
So,
33.9 L of N₂ will react with = X g of Cu
Solving for X,
X = (33.9 L × 381.24 g) ÷ 22.4 L
X = 576.96 g of Cu
As,
Moles = Mass / M.mass
Moles = 576.96 g / 63.54 g/mol
Moles = 9.08 moles of Cu
Result:
So, 33.9 L of N₂ will react with 576.96 g (9.08 moles) of Cu.