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Ivy Kwok 3F wrote:I believe that with regards to the ideal gas law, when the gas constant (R) is involved, we would use atmospheres, but in terms of other equations, we calculate using pascals.
Keep in mind that the gas constant, R, itself can be written using different numbers if the units are different, so this answer isn't entirely correct.
As for the original question, just make sure your units cancel. This is why it's helpful to write units out as well when working out a problem instead of blindly plugging numbers into an equation.
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