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AlladinOne [14]
3 years ago
10

What is it called when an atom has the same number of protons but a different number of neutrons?

Chemistry
2 answers:
defon3 years ago
5 0
It is called an isotope.
maks197457 [2]3 years ago
3 0
Isotopes are different forms of the same element which have the same number if protons but a different number of neutrons.
Eg: Carbon-12 has 6 protons, 6 electrons and 6 neutrons whereas Carbon-13 has 6 protons, 6 electrons and 7 neutrons
Hope this helps :)
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Answer:

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Explanation:

Given reaction is

2Al(s) + 3CuSO4(aq) → Al2(SO4)3(aq) + 3Cu(s)

Amount of aluminum = 1·25 g

Amount of copper (II) sulfate = 3·28 g

Atomic weight of Al = 26 g

Molecular weight of CuSO4 ≈ 159·5

Number of moles of Al = 1·25 ÷ 26 = 0·048

Number of moles of CuSO4 = 3·28 ÷ 159·5 = 0·021

From the above balanced chemical equation for every 2 moles of aluminum, 3 moles of copper (ll) sulfate will be required

So for 1 mole of Al, 1·5 moles of copper (ll) sulfate will be required

For 0·048 moles of Al, 1.5 × 0·048 moles of copper (ll) sulfate will be required

∴ Number of moles of copper (ll) sulfate required = 0·072

But we have only 0·021 moles of copper (ll) sulfate

As copper (ll) sulfate is not there in required amount, the limiting reactant will be copper (ll) sulfate

∴ The limiting reactant is copper (ll) sulfate

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