A light-year is a measure of length equal to the distance, Ask an Expert

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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 4 1016 m in light-years. The speed of light is 3 108 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?

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