A chromate πΆπ‘Ÿπ‘‚4 βˆ’2 solution has an absorbance of 1.534 when the cell length is 1.5 cm. If the molar absorptivity of chromate ion is 5.21 Γ— 103 π‘€βˆ’1 π‘π‘šβˆ’1, calculate the concentration of chromate ion.