A student prepares a solution of a weak monoprotic acid by dissolving 0.080 moles of the acid in enough water to make
1.0 L of solution. The pH of the resulting solution is 4.51. What
is the Ka for this acid?
a- 9.5 X 10-10
b- 1.8 x 10-5
C- 3.9 X 10-4
d- 6.1 x 101
e- 1.2 x 10-8

Which of the following might a chemist choose to study? a. glacier movement in alaska b. better ways to recycle plastics c. the effects of hurricanes on turtle populations d. the vibrations in bridges caused by big trucks

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line