PLEASE HELP How many moles of CoCl3 are in 172.6 ml of a 19.6 mass % solution of CoCl3 which has a density of 1.206 g/ml?

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands