Contrast a mixture and a compound. how are they different?

What is the mass of each element in a 324.8 sample of co2

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.