What is the normal ph of most freshwater lakes, streams, and ponds?

question 3 options:

a)
1 to 3

b)
4 to 5

c)
6 to 8

d)
9 to 11

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

What effect might melting sea ice have for people who live in coastal areas?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom