A gas of 190 mL at a pressure of 74 atm can be expected to change its pressure when its volume changes to 30.0 mL. Express its new pressure in units of atmospheres.

Question

anonymous · Answer

could someone help me out?

anonymous · Answer

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anonymous · Answer

whats the law

australopithecus · Answer

Well PV = nRT

P = pressure
V = volume
n = moles
R = gas constant (Look it up, you need its units to match the units you sub into the equation)
T = temperature in kelvin (degrees celsius - 273) = Temperature in units kelvin

In condition 1 you have,

190mL = V
74atm = P
R = a constant
T = you dont have temperature unless you assume standard conditions, in that case, it is equal to  298.15K

you can solve for moles (n) now

In condition 2

V = 30mL
P = ?
T = 298.15K assume constant temperature
R = Gas constant you pick it
n = Moles you found this in condition 1

anonymous · Answer

alright thank you this is going to help a lot

australopithecus · Answer

Remember units you sub into the equation depends on what R constant you pick.