In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00?

The grooves or folds of the brain are called

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction

The density of benzene at 15 °c is 0.8787 g/ml. calculate the mass of 0.1500 l of benzene at this temperature. enter your answer in terms of grams