Explain how scientists know the composition of the bottom layer of the crust? o Scientists can find evidence when volcanoes erupt.
Scientists look at the bottom of the ocean for evidence.
Scientists use satellite pictures.
o Scientists have collected evidence from meteoroids.

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

Is a pencil falling to the floor anon contact force, a force, or a contact force

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?