How many moles of O2 are in a flask with a volume of 0.45 L at a pressure of 320 kPa and a
temperature of 280K?
What Law is used to solve?

I just need to know the Law and and explanation please I dont understand how it could be any law since it has pressure, volume, and temperature.

0.0833 moles of O₂

Explanation:

Most usual Law to solve this sort of problem, is the Ideal Gases Law

Pressure .  Volume = number of moles .  R . Temperature

where R is the Ideal Gases Constant → 0.082 L.atm/mol.K

First of all we need to convert the pressure from kPa to atm, because the Units of R

320 kPa . 1  atm / 101.3 kPa = 3.16 atm

Now, you replace data:

3.16 atm . 0.45L = mol . 0.082 L.atm/mol.K . 280K

(3.16 atm . 0.45L) / (0.082 L.atm/mol.K . 280K) = mol

0.0833 moles of O₂

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?