Here's why:
* The Ideal Gas Law: The relationship between moles, volume, pressure, and temperature is described by the Ideal Gas Law: PV = nRT, where:
* P = pressure
* V = volume
* n = number of moles
* R = ideal gas constant
* T = temperature
* Missing Information: You've only provided the volume (V = 214 ml). To calculate the number of moles (n), you need the pressure (P) and temperature (T).
To solve the problem, you need to know:
* Pressure: Is the oxygen at atmospheric pressure, or a different pressure?
* Temperature: What is the temperature of the oxygen in Kelvin (K)?
Once you have the pressure and temperature, you can use the Ideal Gas Law to solve for the number of moles.
