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faltersainse [42]
2 years ago
9

10 points: What do Lewis structures show?

Chemistry
1 answer:
Gnesinka [82]2 years ago
8 0
C only valence electrons

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In CF4 and NF3, the ___electron groups on the central C and N atoms have a ___ arrangement. The shapes of the molecules are dete
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Answer:

Explanation:

In CF4 and NF3, the valence electron groups on the central C and N atoms have a tetrahedral arrangement. The shapes of the molecules are determined by the number of bonding and nonbonding of electrons: since CF4 has four bonded atom(s) and zero lone pair(s) of electrons, the shape is tetrahedral.

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3 years ago
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Why are chemists interested in studying thermochemistry? a. Heat is often absorbed during reactions.b. Heat is often released du
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Answer:

a. Heat is often absorbed during reactions.

c. Heat is often released during chemical reactions.

Explanation:

Thermochemistry -

The study of thermochemistry involve the change in the amount of heat , during any physical or chemical process , is referred to as thermodynamics .

The focus of thermochemistry is on the changing amount of energy in the form of heat , on the system with respect to the surroundings .

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The correct options are -  a , c.

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How many protons are in Calcium - 41?
EastWind [94]

Answer:

the correct answer to your question is 20

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3 years ago
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HELP PLZ!!!!!
Molodets [167]

The answer would be c as the cart is not in motion therefor ruling out kinetic and it is completely at rest making all of it energy potential

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Its okay my friend. you dont need to over stress it.
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