Which of the following apply to gases? select all that apply.

-gases mix faster than solids or liquids.

-gas particles can move like solids and liquids along with translational motion.

-gas collisions are elastic.

-gases with larger molecular weights diffuse slower than gases with lower molecular weights.

-gases with larger molecular weights diffuse faster than gases with lower molecular weights.

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Which position represents spring in the southern hemisphere? a) b) c) d)

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.