In this case mass of the pressure used for the calculation (745 torr) is less than the correct room temperature (754 torr).
What is barometric pressure ?
The measurement of atmospheric pressure, more particularly the weight of air molecules at a given location on Earth.
What is pressure ?
Divided by the surface area of the wall, the total force of all gas particle/wall collisions: One of the basic measurably present quantities of this phase of matter, pressure, is an effect that all gases have.
In this case, mass of the pressure used for the calculation (745 torr) is less than the correct room temperature (754 torr). This will lead to lower calculation of mass being present for Mg metal, since the pressure is 9 torr less than the actual pressure.
Therefore, in this case mass of the pressure used for the calculation (745 torr) is less than the correct room temperature (754 torr).
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