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lyudmila [28]
3 years ago
14

What is penetration? How is it related to shielding? Use the penetration effect to explain the difference in relative orbital en

ergies of a 3p and a 3d electron in the same atom.
Chemistry
1 answer:
Whitepunk [10]3 years ago
5 0

Answer: penetration is the ability of an electron in a given orbital to approach the nucleus closely. Shielding refers to the fact that core electrons reduce the degree of nuclear attraction felt by the orbital electrons. Shielding is the opposite of penetration. The most penetrating orbital is the least screening orbital. The order of increasing shielding effect/decreasing penetration is s<p<d<f.

Explanation:

The order of penetrating power is 1s>2s>2p>3s>3p>4s>3d>4p>5s>4d>5p>6s>4f....

Since the 3p orbital is more penetrating than the 3d orbital, it will lie nearer to the nucleus and thus possess lower energy.

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5 0
3 years ago
Read the chemical equation. Fe2O3 + CO → Fe + CO2 If 3 moles of Fe2O3 react with 1.5 moles of CO, how many moles of each product
vfiekz [6]

Answer:- A) 1 mole of Fe and 1.5 moles of CO_2 .

Solution:- The balanced equation is:

Fe_2O_3+3CO\rightarrow 2Fe+3CO_2

From balanced equation, there is 1:3 mol ratio between Fe_2O_3 and CO,  From given data, 3 moles of  Fe_2O_3 and 1.5 moles of CO are taken for the reaction. CO is the limiting reactant as it's moles are less than the other reactant and which is also clear from the mole ratio. We could do the calculations also to support this. Let's calculate the moles of CO required to react completely with given 3 moles of  Fe_2O_3 .

3molFe_2O_3(\frac{3molCO}{1molFe_2O_3})

= 9 mol CO

So, from calculations, 9 moles of CO are required to react completely with 3 moles of Iron(III)oxide but only 1.5 moles of CO are available. Hence, CO is the limiting reactant and the product moles are calculated from this as:

1.5molCO(\frac{2molFe}{3molCO})

= 1 mol Fe

1.5molCO(\frac{3molCO_2}{3molCO})

= 1.5 mol CO_2

So, the correct choice is A) 1 mole of Fe and 1.5 moles of CO_2 .

7 0
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