What happens to the energy needed to remove an electron as the atomic number increases across a period?
1 answer:
Answer:
In general, the energy needed to remove an electron (the ionization energy) increases as the atomic number increases across a period.
Explanation:
Each additional proton increases the attraction between the nucleus and the electron.
Thus, it takes more energy to remove an electron as you add extra protons.
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The efficiency : 95%
<h3>Further explanation</h3>Efficiency : the ratio between output and input work
In general, the value of the output of a machine is less than the value of the input because of the frictional force in the machine.
The greater the efficiency of the engine, the better the machine
Can be formulated :
w output = 190 J
W input = 200 J
The efficiency :
Answer : The minimum amount of 6.9 M needed is, 2.0 L
Explanation :
The given chemical reaction is:
First we have to calculate the moles of
Molar mass of = 2 g/mol
Now we have to calculate the moles of
From the balanced chemical reaction we conclude that,
As, 3 moles of produced from 3 moles of
So, 13.9 moles of produced from 13.9 moles of
Now we have to calculate the mass of
Thus, the minimum amount of 6.9 M needed is, 2.0 L