If each of these substances costs the same amount per kilogram, which substance would be the most cost effective way to lower the freezing point of water? Assume
all ionic compounds completely dissociate.
Nal
CaCl2
KBr
C6H1206

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .