The initial sample of a mineral has 2.03 x 10-7 L of isotope 40-Ar and 3.32 x 10-7 g of isotope 40-K. With this info and

[answerhappygod]

The initial sample of a mineral has 2.03 x 10-7 L of
isotope 40-Ar and 3.32 x 10-7 g of isotope 40-K. With this info and
assuming standard temperature and pressure, determine what the age
of the mineral is.
(λEC = 0.578 x 10-10 yr-1, λβ- = 4.837 x 10-10 yr-1, R = 0.08206
L atm K-1 mol-1)