1- A solution contains 5 grams of glucose per 100 milliliters. Each mole of glucose weighs 180 grams. How many moles are there in 200 milliliters of the glucose solution?
2- A light-year is a measure of length equal to the distance that light travels in 1 year. Compute the conversion factor between light-years and meters, and find the distance to the star Proxima Centauri m in light-years. The speed of light is m/s. Show your conversion work with the appropriate ratios.
3- A jogger is going at 12ft/min. How fast is she going in miles per hour?