What is the ph of 0.50 m h2s (given that ka=8.91 x 10^-8)?
a. 3.7
b. 1.7
c. 6.9
d. 3.6

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

lol idk man i guess u gotta ask bill nye the science guy

jjj89t'ji; it hink the answer is your mom is not si