how much heat has been lost when 78g piece of copper is placed into a calorimeter and cools from 120 to 40c

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

How does climate change cause the ocean's thermohaline current to slow down?

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