5. Imagine that you have been given an unknown substance and you want to find its density. You measure its mass as 78,8 g and its volume as 8 cm? What is the density of the substance?
A.0.102 g/cm
B. 0.98 g/cm
C. 9.85 g/cm
D. 630.4 g/cm

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