Which of the following is a weak electrolyte?(i swear to god if u put down random things, i had to ask this question 3 times already, don't anwser if u don't know) potassium hydroxide solution
barium chloride solution
sulfuric acid
silver chloride solid
distilled water
copper (II) nitrate solution
sodium chloride solid
ammonium carbonate solution
acetic acid
sodium chloride solution
magnesium sulfate solution
sugar (C12H22O11) solid
sugar (C12H22O11) solution
calcium phosphate solid
nitrogen gas
tap water

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Consider the story you just read. all but one of the choices below indicate that something is living.

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.