Aiden S. answered • 10/14/21
Passionate in Chemistry, undergrad at SJU, research oriented
Hello, this is a great question! To answer you can utilize the ideal gas equation, PV=nRT. (P=pressure, V=Volume in L, n=moles, R= gas constant 0.08206 L atm/mol K, T=temp in kelvin). When I attack these problems I like to arrange the equation so that I have what I need on one side and what I have on the other. This is done algebraically in this equation by dividing each side by RT to get the equation n=PV/RT. Once you have the desired equation it is simply plug and chug!! n=(0.350ATM)(2.50L)/(0.08206LATM/mol K)(255K) ensure that units cancel and are correct; ATM cancels on top with the one on the bottom, L cancels on top with the one on the bottom, moles are in the denominator of the denominator which brings it to the top which is what you need, K is present in denominator of denominator so it moves to the top to cancel out the K on the bottom Whallla you have moles as the only unit. This is the go ahead to insert into calculator and find that the number of moles is equal to 0.042 moles.:) Best wishes!
