Apolluted lake with a constant volume 10*10^6 m3 is fed by a pollution-free stream with flow rate qs=5 m3/s that has a contaminant concentration cs=10 mg/l. a factory dumps 5 m3/s of a non-conservative waste with concentration cw= 100 mg/l into the lake. the pollutant has a reaction rate coefficient k of 0.2/day and the reaction is first-order decay. assuming the pollutant is well mixed in the lake, find the steady-state concentration of pollutant in the lake.

An excess of lithium oxide undergoes a synthesis reaction with water to produce lithium hydroxide li2o+h2o→2lioh if 1.05 g of water reacted, what is the theoretical yield of lithium hydroxide? a) 5.83 x 10–2 g lioh b) 1.17 x 10–1 g lioh c) 2.79 x 100 g lioh d) 1.40 x 100 g lioh

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?

Salt in oceans comes from and of rocks