If a 6.00 g sample of an optically pure compound was dissolved in 40.0 mL of CCl4 and the observed rotation was +3.30 °, measured in a 10.0 cm (1.00 dm) polarimeter tube, how would one determine the specific rotation of the pure compound? Also would it be R or S? I'm assuming that's based on the specific rotation (I'm pretty sure if its R it has a positive specific rotation and vice versa).