answersLogoWhite

0

Convert the volume and pressure to STP using the combined gas law: P1 V1 / T1 = P2 V2 / T2 Once you know how many liters you have at STP (273K and 1 atmosphere), you know the mass of the gas because 22.4L of gas is one mole. Just convert moles back to mass by multiplying by the GMW (atomic weight) for that particular gas. If you know mass and volume, the density is simply mass/volume. PV/RT=n will also find you the moles (n). Say you have 1 Liter of Oxygen at 250K at 1atm. What is its density? * P1 = 1.000atm * P2 = 1.000atm * V1 = 1.000L * V2 = X * T1 = 250.0K * T2 = 273.0K

Since pressure is constant, it cancels out of the combined gas law and leaves you with Charles' law (V1 / T1 = V2 / T2): * 1.000L • 273.0K/250.0K = 1.092L

* 1.092L of a gas at STP is 0.0488 mol (as long as it behaves ideally)

* Oxygen's (O2) GMW is 31.988 grams/mol

* 0.0488 mol • 31.988 grams/mol = 1.561 grams

* That means that at your original temperature, you had 1.561 grams of a gas that occupied 1 Liter. Its density at that temperature would be 1.561 grams/liter

You can shortcut all that if you are holding pressure constant with: GMW • (273K / T1) / 22.4 L/mol = density in grams/liter. If your pressure is changing you'll need to figure that in: GMW • (P1 • 273K / P2 • T1) / 22.4 L/mol = density in grams/liter. DON'T FORGET TO CONVERT YOUR TEMPERATURE TO ABSOLUTE (KELVIN)!!!! All that will only work for gases for which you know the composition (and so you are able to obtain the GMW). If you don't know the composition you will have to find it by experimentation. If the gas ceases to behave ideally (e.g., it condenses at that temperature) the above will also not work.

User Avatar

Wiki User

16y ago

What else can I help you with?

Related Questions

How do you calculate volume if given bulk density?

Bulk density = dry weight / volume, then by knowing the dry weight and bulk density we can calculate the volume.


How do you calculate the volume of an object when you are given only the mass and the density?

density=mass/volume volume=mass/density


How do you calculate volume if only mass was given?

You would need to know the density of the object in order to calculate the volume from the mass. The formula to calculate volume from mass and density is: Volume = Mass / Density.


How to calculate mass with density and volume given?

You have to multiply the density by the volume to get the mass of the object.


How do you calculate density in physics?

To calculate density in physics, you divide the mass of an object by its volume. Density is a measure of how much mass is contained in a given volume. The formula for density is density mass/volume.


How do you calculate volume when mass and density are given?

Density = Mass/Volume so Volume = Mass/Density. Provided the object is solid.


How do you calculate volume if mass and density are given?

Volume = mass divided by density (using consistent units).


How do you find the mass of an object when you are given the volume and density of the object?

You can find the mass of an object by multiplying its volume by its density. The formula to calculate mass is: mass = volume x density. Simply plug in the given values for volume and density to calculate the mass of the object.


How do you calculate charge density in a given system?

To calculate charge density in a given system, you divide the total charge by the volume of the system. This gives you the amount of charge per unit volume, which is the charge density.


How do you find mass when given volume temperature and heat capacity?

This question requires density to answer. Density is a ratio of mass to volume, and is dependent on temperature. Materials do have variable density based on temperature. The equation for density is mass/volume.


To calculate density divide an object's?

To calculate density, divide the object's mass by its volume. The formula for density is Density = Mass / Volume. Density is a measure of how much mass is contained in a given volume.


What is the mass and volume of gold if its density is 19.3 gcm3?

To calculate the mass and volume of gold, we need to know either the mass or the volume specifically. Given the density of 19.3 g/cm3, if you have the volume of gold, you can calculate the mass by multiplying the volume by the density. If you know the mass, you can calculate the volume by dividing the mass by the density.