1.50 M solution of ammonium chloride was left in a beaker over spring break. Upon returning to the lab, 18.5 grams of solid ammonium chloride was left. We redissolved these crystals in water until we had 500.0 mL of solution. What was the concentration (molarity) of this new solution?

Explanation:

hyy gemsqueen ,where r u from? and which level question is this?

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )