6. You have a DNA solution from which a 1/20 dilution has an absorbance at 260nm of 0.6. What volume in uL should be added to 10L of water to obtain a final concentration of 120 pg/HL? 7. You wish to prepare 1L of a 5M solution of NaCI (MW: 58g/mole, density: 2.16g/mL). What a mass of solid NaCl (in grams) and what volume of water (in milliliters) would you need to prepare the desired solution? 8. You wish to prepare a solution containing 10 g of Mg, and a final concentration of 0.5M LICI. You have solid MgCl2 (MW of MgCl2 : 95g/mole, MW of Mg: 24g/mole, MW of Cl2 : 71g/mole; density of MgCl2: 2.3g/mL) and a 1M stock solution of LiCI. What mass of MgCl2 and what volume of the LiCI stock solution would you add to 100 mL of water to obtain the desired solution