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sladkih [1.3K]
2 years ago
13

Which element has the highest first electron affinity? which element has the highest first electron affinity? te ba xe cs?

Chemistry
1 answer:
Savatey [412]2 years ago
4 0
Electron affinity is the energy released when an electron is added to the gaseous atom or ion.
Electron affinity increases by moving from left to right in periodic table and decreases by moving from up to down.
So the correct answer is Te
Xe: being as noble gas it is unacceptable to gain an electron
The values of electron affinity for these elements:
Ba (13.9 kJ/mol) - Te (190.1 kJ/mol) - Xe (-80 kJ/mol) - Cs (45.5 kJ/mol)

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How many moles are in 213 grams of NaCl?
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Answer:

There are 3, 64 moles of NaCl.

Explanation:

First we calculate the mass of 1 mol of NaCl, starting from the atomic weights of Na and Cl obtained from the periodic table. Then we calculate themoles in 213 grams of NaCl, making a simple rule of three:

Weight NaCl= Weight Na + Weight Cl = 23 g + 35, 5 g= 58, 5 g/ mol

58,5 g ------1 mol NaCl

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5 0
3 years ago
What are the two ways in which pressure can be increased?
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7 0
3 years ago
What is the percent yield for a reaction if we predicted the formation
bogdanovich [222]

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18.1%

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5 0
2 years ago
An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 264 N. (a) What is the equi
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k = F/e ............................ Equation 2

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2 years ago
The synthesis of nitrogen trihydride from nitrogen gas and hydrogen gas is shown by which balanced chemical equation?
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 The correct answer is:  [B]:  
___________________________________________________________
                     "  N₂ (g) + 3 H₂ (g) → 2 NH₃ <span>(g)  "    .
___________________________________________________________
Note of interest:
___________________________________________________________
This particular reaction is known as the "</span>Haber process" .
___________________________________________________________
7 0
3 years ago
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