If an impure sample of soda ash is known to contain 40.00% of na2co3, calculate the sample size in mg which will react with exactly 40.00 ml of 0.1100 m hcl. what is the % purity of a soda ash sample if it took 42.15ml of 0.1100 m hcl to titrate 0.5017 g of the sample?

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange