C. Electron. It’s a negatively charged particle that orbits around the nucleus. Usually, there are multiple electrons going around the nucleus in different orbitals (the circle around the nucleus in which the electron travels). The mass is much smaller compared to that of a proton or neutron and can be ignored when calculating the mass of an atom.
Liters of gas at 14.7 psi: 3674 L
Explanation:
We can solve this problem by using Boyle's law, which states that:
"For an ideal gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"
Mathematically:

where
p is the gas pressure
V is its volume
This law can also be rewritten as

Where:
is the initial pressure of the gas
is the initial volume of the gas
is the final pressure of the gas
is the final volume
Therefore, we can calculate the volume of gas corresponding to 14.7 psi of pressure:

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