HELP ASAP PLS a 35.0 g block of copper is dropped into 450 grams of water at 21.5 C. The temperature of the water changes to 22.3 C. Does the water's temperature rise or fall?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Can someone me with questions 15 to 17 plz.

For the reaction, 4 a(g) + 3 b(g) => 2 c(g), the following data were obtained at constant temperature. experiment initial[a],mol/l initial [b],mol/l initial rate, m/min 1 0.200 0.150 5.00 2 0.400 0.150 10.0 3 0.200 0.300 10.0 4 0.400 0.300 20.0 which of the following is the correct rate law for the reaction? 1. rate = k[a]2[b]2 2. rate = k[a][b] 3. rate = k[a]2[b] 4. rate = k[a][b]2