Corban E. answered 06/17/21
AP Chemistry Tutor and Former Teacher (Gen Chem, IB, O-Level, A-Level)
Ideal gas law:
PV=nRT
P=pressure in atm
V= volume in L
n=moles
R=0.08206 Latm/molK
T=temp in K
I assume by -12 you mean -12C because there are no negative K temps.
K=C+273.15
K=-12+273.15
K=261.15 K for temperature, T
PV=nRT
1.86(V)=2.57(0.08206)(261.15)
Solve for V.