Abreathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. what is the partial pressure of oxygen at 101.4 kpa if phe = 82.5 kpa and pco2 = 0.4 kpa?

18.5 kPa is the partial pressure of oxygen.

Explanation:

Total pressure of the gases = p =  101.4 kPa

Partial pressure of the helium gas =

Partial pressure of the carbon dioxide gas =

Partial pressure of the oxygen gas =

Applying Dalton's law of partial pressure:

18.5 kPa is the partial pressure of oxygen.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.