The molar heat of vaporization for methane, ch4, is 8.53 kj/mol. how much energy is absorbed when 54.8 g of methane vaporizes at its boiling point?

6.42 kj
29.1 kj
137 kj
467 kj

Label a-f based on the table using c for concentrated and d for dilute

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

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.