chemistry pre-lab questions. help please >.<?

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1.a. For a reaction with the stoichiometry 2 A → P, write an expression that relates the rate of disappearance of A to the of appearance of P.

b. For a reaction with the stoichiometry A + 2 B → 3 P, write an expression that relates the rate of disappearance of A to the rate of disappearance of B and another expression that relates the rate of disappearance of A to the rate of appearance of P.

2.a. For a reaction with the stoichiometry A + 2 B → P, a study of the initial rate of reaction revealed that the amount of time for formation of 1% of the total amount of possible product was halved when the concentration of A was doubled, and doubled when the concentration of B was halved. Write a rate expression for this reaction.

b. For a reaction with the stoichiometry A + B + C → P, a study of the initial rate of the reaction revealed that the amount of time for formation of 1% of the total amount of possible product quartered when the concentration of A was quadrupled, did not change when the concentration of B was halved, and doubled when the concentration of C was halved. Write a rate expression for this reaction.

3.What are the functions of the solutions KCl and K2SO4?
 
sure took you a while to write this out. could have used that time studying.

1a. a disappears twice as fast as p appears.
1b. b disappears twice as fast as a. p appears three times the rate that a disappears.
 
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