Roberto has two cubes made of different substances. The dimensions of the cubes are shown in the illustration below. Roberto measures the mass of each cube using a
balance and records the measurements in the table below. When Roberto places
the cubes in water, he finds that one cube floats, and one cube sinks.

What is the density in grams of the cube that will sink in water

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