Which of the following is necessary to determine the rate of a reaction using the rate law? a. the starting temperature of the reaction b. the activation energy of the reaction c. the concentrations of the reactants d. the equilibrium constant of the reaction

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?