55.1 grams of tin at 90.6℃ is dropped into a calorimeter with 75.4 grams of water at 21.0℃. The temperature of both the metal and the water reaches 27.2℃. Solve for specific heat of tin.

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

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

What is the wavelength of a wave with a velocity of 50 m/s and a frequency of 5hz a 250 m b 0.1 m c 10m d 0.01 m