Which is true about relative dating? Potassium –Argon dating is used on very old rocks and minerals.

Carbon-14 dating is used on rocks and minerals that are relatively young

Relative dating uses the half-life of isotopes to get the exact age of a rock or mineral

The law of superposition is used to determine a rocks relative age.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Answer asap need 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.

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?