how do I find the density of CO2, I am not allowed to look it up and all I have is H202 and ethanol. I don't think I have to use both, but I can't figure out how to calculate it.
It's really very easy to do.
You know 1 mole of a gas occupies 22.4 L @ STP.
You know 1 mole has a mass (for CO2) of 44 (32 for Oxygen and 12 for C = 44).
Since mass= volume x density, then
density = mass/volume = 44/22.4 = ??
i can't use any formulas to find the volume of the gas. Through an experiment I calculated the mass, but know I am having trouble with the volume.
Actually, using 22.4 L/mole is not a formula for the volume but an experimentally determined number. If this is not satisfactory, I suggest you type in your WHOLE problem instead of getting it to us by bits and pieces. It's tough to answer a problem when we don't know the limitations and/or directions. And there is NO indication at all about how you are to use H2O2 and EtOH.
To find the density of CO2 without looking it up, you can use the ideal gas law and perform an experiment using materials you have available—H2O2 (hydrogen peroxide) and ethanol. Here's a step-by-step procedure:
1. Collect a small volume of CO2 gas: One way to do this is by producing CO2 gas through the reaction between hydrogen peroxide (H2O2) and ethanol. In a well-ventilated area, mix equal volumes of H2O2 and ethanol in a container.
2. Create a gas collection setup: Set up a gas collection apparatus using a burette or a gas syringe. Fit the burette to a clamp, fill it with water, and invert it in a water-filled beaker or basin.
3. Collect and measure CO2 gas: Carefully pour the H2O2 and ethanol mixture into the burette while it is inverted in the water. As the reaction occurs, bubbles of CO2 gas will rise and displace the water. Measure the volume of gas collected.
4. Measure the temperature and pressure: Record the temperature in Celsius (°C) of the water bath and the atmospheric pressure in kilopascals (kPa). You can use a thermometer and a barometer or consult weather reports for the current pressure.
5. Apply the ideal gas law: The ideal gas law relates the pressure (P), volume (V), and temperature (T) of a gas. It can be written as: PV = nRT, where n is the number of moles of the gas and R is the ideal gas constant.
6. Convert moles to grams: Since you want to find density, you need to determine the mass of CO2 instead of moles. To do this, you'll need to know the molar mass of CO2, which is approximately 44 grams per mole.
7. Calculate the density: Divide the mass of CO2 by the volume of gas collected to find the density. Density (ρ) is equal to mass (m) divided by volume (V): ρ = m/V.
By following this procedure, you can experimentally determine the density of CO2 without relying on external sources of information. Remember to take safety precautions when working with chemicals and acidic solutions, and consult your teacher or instructor if there are any specific guidelines or restrictions for your experiment.