Ethylene glycol (c2h6o2) is used as an antifreeze in cars. if 400 g of ethylene glycol is added to 4.00 kg of water, what is the molality? calculate how much the freezing point of water will be lowered. the freezing-point depression constant for water is kf = –1.86°c/m. show your work.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c