The diffusion constant for the amino acid glycine in water is 1.06 × 109 m²/s. In a 2.0-cm-long tube with a cross-sectional area of 1.8 10-4 m², the mass rate of diffusion is m/t = 4.2 x 10-14 kg/s, because the glycine concentration is maintained at a value of 8.7 x 10-3 kg/m³ at one end of the tube and at a lower value at the other end. What is the lower concentration?

The chlorine content of a pool with a capacity of 1.80×104 L was discovered to be 0.00145% by mass, which is well below the sanitary level of 0.00305%. How much chlorine needs to be added in order for the pool to meet the health regulation standard of 0.00305%? First draw a flowchart, then given that the pool consists of fresh water and chlorine, write the total mass (or alternatively chlorine mass) and fresh water balance equations, and then calculate the mass of chlorine in grams that needs to be added to the pool. Assume that the density of the pool water is the same as that of fresh water (1.00 kg/L), the pool is filled to its rated capacity (1.80×104 L), and that the required chlorine can be added to this capacity.

Hydrochloric acid is used to remove calcium oxide deposits from the tanks at pulp and paper mills. What mass of the acid is required to remove 48kg of calcium oxide from the tank

A drug passing through a 1-mm-thick membrane has a diffusion coefficient of 4.23 x 10-7 cm? per second. The radius of the area exposed to the solution is 2 cm, and the concentration of the drug in the donor compartment is 0.5 mg/mL. Calculate the diffusion rate of the drug.

A student analysed mercury content on a canned tuna. According to EPA standard, the permissible limit of mercury in fish is 0.1 ppm. In this study, an average of 11.4 ± 2.1 ng/g was obtained based on six sample replicates. Suggest a suitable analytical instrument to be used in this analysis and draw a conclusion on the safety of mercury content of this canned tuna.

H2SO4(aq)+NaOH(s)→H2SO4(aq)+NaOH(s)→ (neutralization of both acidic protons) Express your answer as a chemical equation. Identify all of the phases in your answer.

Using the Poiseuille formula, the viscosity of carbon dioxide was measured by comparing its flow rate through a long, narrow tube with that of argon. For the same pressures, the same volume of carbon dioxide passed through the tube in 55 s as argon in 83 s. The viscosity of argon at 25 °C is 208 μP. What is the viscosity of carbon dioxide? Give your answer in μP