In order for fish to survive, the dissolved oxygen content of a lake or stream must be at least 3 µg mL-1. A particular lake has pH = 6.5 and T = 25oC. What is the molar DO concentration (no units req.)?

the answer is a. co2, this would be colder than the : )

explanation:

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8