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At 25oC, three moles of a gas occupy a volume of 4.0 L at 1.9 kPa. If the volume increases to 12.0 L, what will the new pressure be?

A. 5.70 kPa
B. 0.63 kPa
C. 1.0 kPa
D. 3.3 kPa

Respuesta :

Nirina7
the answer:
according to Boyle's law concerning Pressure (P), Volume (V), Temperature (T) and number of mole (n) , we have the famous formula:

PiVi = Pf Vf, 

Pi=1.9kPa
Vi= 4L
Vf = 12L
T=25
n=3 
Pf = ?
let's find the value of Pf
from the equation
PiVi   = Pf Vf  we can have Pf= PiVi  / Vf

Pf = 1.9*4 / 12 = 0.63

so the answer is B. 0.63 kPa

it is 0.63kPa for apex..

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