determine the molality and mole fraction of concentrated aqueous hcl, which is 12.0 m and has a density of 1.19 g/ml

Why does a red shoe appear red in daylight

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same