900k,what is the pressure inside a container? I understand that the air pressure is proportional to both the air's density and air temperature, but I'm unsure of the calculation to determine the pressure

What is the container volume? How much is in it? Is it a gas? What does the 900k mean? Is that supposed to be the temperature? (If so, it should be written 900 K)

This is presumably an exercise in using the ideal gas law, PV = nRT, but you need more information (You need n and V). R is a constant of nature.

To calculate the pressure inside a container, you need to consider various factors, including the air's density, temperature, and altitude. The relationship between these variables is described by the ideal gas law equation:

PV = nRT

Where:
P = pressure (in Pascals)
V = volume of the container (in cubic meters)
n = number of moles of gas
R = ideal gas constant (approximately 8.314 J/(mol·K))
T = temperature in Kelvin

To calculate the pressure, you would need to know the values of the other variables in the equation. However, with the information provided in your question (900k), it is unclear which variable you are referring to.

If you are referring to a specific temperature (T), please provide the temperature value in Kelvin. Additionally, if you have any other relevant information, such as the volume of the container or the number of moles of gas, please include that as well.