Acetone is a common solvent and has a density of 0.7899 g/ml. what volume of acetone, in ml, has a mass of 30.5 g?

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

How many grams of mgbr2 are needed to produce 75g or metal?