I believe the answer is A
Human ear can only hear sounds between 20-20,000 Hz so it must be answer B
The atomic number of oxygen is 8. The mass number of an oxygen atom with 7 neutrons is 15.
<h3>What is atomic mass?</h3>
Atomic mass is the average mass of the atom. It is measured in atomic mass units, that is Dalton. The mass number is calculated by the number of neutrons and atomic number.
The atomic number is the number of protons present in the atoms. The atomic number of oxygen is 8
The mass number can be calculated by adding those units
atomic number + number of neutrons
Mass number = 8 + 7 = 15
Thus, the mass number of an oxygen atom with 7 neutrons is 15.
To learn more about atomic mass, refer to the link:
brainly.com/question/8101390
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Answer:
may I ask what's the temperature?
Answer:
591.471 MILLIMETERS
Explanation:
Formula
for an approximate result, multiply the volume value by 29.574
29.574*20=591.471
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Miss Hawaii ; )
