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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Answer:
Test tube one is a compound because it is 2 elements combine..Test tube to is an element
Explanation:
Answer:
B people control how plants or animals reproduce to get desired traits
Explanation:
if you get it correct mark meh brainliest or however you say it so ppl know its correct
The change in kinetic energy was 34 kJ.
<em>Step 1</em>. Calculate the <em>total mass</em>
Total mass = 100 kg + 200 kg = 300 kg
<em>Step 2</em>. Calculate the <em>initial kinetic energy </em>(<em>KE</em>_i)
<em>v</em> = 0
<em>KE</em>_i = ½ <em>mv</em>^2 = ½ × 300 kg × 0^2 = 0
<em>Step 3</em>. Calculate the f<em>inal kinetic energy</em> (<em>KE</em>_f)
<em>KE</em>_f = ½ <em>mv</em>^2 = ½ × 300 kg × [15 m·s^(-1)]^2 = 34 000 kg·m^2s^(-2) = 34 000 J = 34 kJ
<em>Step 4</em>. Calculate the <em>change in kinetic energy
</em>
Δ<em>KE</em> = <em>KE</em>_f - <em>KE</em>_i = 34 kJ – 0 = 34 kJ