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Blababa [14]
2 years ago
11

Oxygen has an atomic number of 8. Which of the following could form the nucleus of an atom of oxygen?

Chemistry
2 answers:
Naddik [55]2 years ago
4 0

Answer:

8 protons and 10 neutrons

Mazyrski [523]2 years ago
3 0

Answer:

<u>Answer</u><u>:</u><u> </u><u>8</u><u> </u><u>protons</u><u> </u><u>and</u><u> </u><u>8</u><u> </u><u>neutrons</u>

Explanation:

The mass number of oxygen is 16

Atomic number is 8

but proton number = atomic number = 8 protons

neutrons = mass \: number - atomic \: number \\

neutrons = 16 - 8 = 8 neutrons.

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What is the expected value for the heat of sublimation of acetic acid if its heat of fusion is 10.8 kJ/mol and its heat of vapor
Dennis_Churaev [7]

Answer:

35.1 kJ/mol is the expected value for the heat of sublimation of acetic acid.

Explanation:

CH_3COOH(l)\rightarrow CH_3COOH(g)..[1]

Heat of vaporization of acetic acid = H^o_{vap}=24.3 kJ/mol

CH_3COOH(s)\rightarrow CH_3COOH(l)..[2]

Heat of fusion of acetic acid = H^o_{fus}=10.8 kJ/mol

Heat of sublimation of acetic acid = H^o_{sub}=?

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