Consider 50.0 ml of a solution of weak acid ha (ka = 1.00 x 10^-6), which has a ph of 4.000. what volume of water must be added to make the ph = 5.000?

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.