PLEASE ANSWER

How does refraction work?

A. Light speeds up as it goes through more dense materials.

B. Light waves bend when they go through a small slit or hole.

C. Light slows down as it goes through more dense materials.

D. Light waves get closer together as they go through more dense materials.

Consider the story you just read. all but one of the choices below indicate that something is living.

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]

I’m an electrically neutral atomic any element, there are equal numbers of