How much water needs to be added to 27.00 millilters of 1.500 M LiOH solution to make a 0.02000 M LiOH solution?

When balancing a chemical equation:

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules