The solubility of oxygen in lakes high in the rocky mountains is affected by the altitude. if the solubility of o 2 from the air is 2.67 × 10 –4 m at sea level and 25°c, what is the solubility of o 2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm?

assume the temperature is 25°c, and that the mole fraction of o 2 in air is 0.209 at both 12,000 ft and at sea level. 1.75 × 10–4 m 2.67 × 10–4 m 3.66 × 10–5 m 4.06 × 10–4 m

S = 1,75x10⁻⁴M

Explanation:

It is possible to answer this question using Henry's law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The formula is:

S = k×Pi

Where S is solubility, K is Henry's constant and Pi is partial pressure.

At sea level, Pi of O₂ is:

1atm×0,209 = 0,209 atm. Replacing:

2,67x10⁻⁴M = k×0,209atm

k = 1,28x10⁻³M/atm

At 12,000ft Pi of O₂ is:

0,657atm×0,209 = 0,137 atm. Replacing:

S = 1,28x10⁻³M/atm×0,137atm

S = 1,75x10⁻⁴M

I hope it helps!

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72