If the acid dissociation constant, Ka, for an acid HA is 8 x 104 at 25°C, what percent of the acid is dissociated

in a 0.50 M solution of HA at 25°C?

A

08%

Which of the following pairs of substances best illustrates the law of multiple proportions? A. H2 and O2 B. NO and NO2 C. P2O5 and PH3 D. CaCl2 and CaBr2 NO and NO2 best illustrates the law of multiple proportions.

How is solute concentration related to the solute-solvent interactions and the rate at which the solute dissolves? A) Decreasing the solute concentration increases the solute-solvent interactions and decreases the rate at which the solute dissolves.

If a solution containing 55.42 g 55.42 g of mercury (II) nitrate is allowed to react completely with a solution containing 16.642 g 16.642 g of sodium sulfate according to the equation below.

In the reaction between bromine and sodium, a bromine atom gains an electron and forms the bromide ion, Br-. What happens to bromine?

Which is the most likely way to automotive engineer would use chemistry

1000ml of a gas is cooled from 500 K to 250 K, what is it's final volume? A. 250 ml B. 1000 ml C. 500 ml D. 750 ml E. 2000 ml

A reacton has a theoretical yield of 22.8g. When the reaction was carried out, 15.1g of the product was obtained. What is the percent yield?

Which of Newtons law's is sometimes expressed as "for every action there is equal and opposite reaction"

Provide a general comparison of the empty space in a solid with that in a liquid as well as

Which of the following are chemicals? A. clothing B. food C. fuels D. all of the above