HELP PLEASE Which of the following BEST describes
the size of asteroids?
A. All of them are smaller than a kilometer in diameter.
B. All of them are larger than 100 kilometers in diameter.

C. They range from smaller than 1 km to about 300 km in
diameter.
D. They range from 1 km to about 100 km in diameter.

I put chemistry because there’s no astronomy

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]

Which samples do the atoms have the least kinetic energy