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sweet [91]
3 years ago
9

An electrically neutral atom of oxygen has eight electrons. What other facts do you know for sure about this atom? 1.) there are

eight neutrons in the nucleus 2.) there are eight protons 3.) there is a charge of +8 on an atom of beryllium 4.) there is a charge of -8 on an atom of beryllium
Chemistry
2 answers:
Sati [7]3 years ago
6 0

2.) there are eight protons

umka2103 [35]3 years ago
6 0

Answer: The correct options are:

1.) there are eight neutrons in the nucleus

2.) there are eight protons

Explanation:

Since, it is given that given atom of oxygen is electrically neutral and it contains 8 electrons. This also means that number of protons present in it will also be 8.

Hence, its atomic number that is, sum of only total number of protons present in the oxygen atom are also 8.

Whereas mass number or atomic mass is the sum of total number of both protons and neutrons present in an element.

For example, given atom has atomic number is 8.  And, it is known that atomic mass of O is 16 g/mol.

Therefore, number of neutrons present in it will be calculated as follows.

                    Mass number = no. of protons + no. of neutrons

                         16 = 8 + no. of neutrons

                    no. of neutrons = 16 - 8  

                                               = 8

Hence, we can conclude that in the given atom of oxygen there are 8 protons and 8 neutrons.

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Answer : The volume of gas will be, 113.5 L

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 60 atm

P_2 = final pressure of gas = 30 atm

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T_1 = initial temperature of gas = 115 K

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Now put all the given values in the above equation, we get:

\frac{60atm\times 29L}{115K}=\frac{30atm\times V_2}{225K}

V_2=113.5L

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Identify the correct statement. A. It is not possible for two atoms to share more than two electrons. B. A covalent bond has a l
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B. A covalent bond has a lower potential energy than the two separate atoms.

Explanation:

<em>Identify the correct statement. </em>

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<em>B. A covalent bond has a lower potential energy than the two separate atoms.</em> TRUE.

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3 years ago
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