I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow.


Determine the density of chlorine gas at 22C and 1.00 atm pressure.

You can rearrange the old stand-by equation of PV = nRT to

PM = (g/v)RT and g/v is density; M is molar mass.
Remember to use T in Kelvin.

I giving up, i cant do these

To determine the density of chlorine gas, you need to know its molecular weight and the ideal gas law equation. Here's how you can find the density:

Step 1: Find the molecular weight of chlorine gas (Cl2). To find the molecular weight, you add up the atomic masses of each element in the molecule.

The atomic mass of chlorine (Cl) is approximately 35.5 g/mol. Since there are two chlorine atoms in chlorine gas (Cl2), the molecular weight of chlorine gas is 35.5 g/mol x 2 = 71 g/mol.

Step 2: Use the ideal gas law equation, which is given by: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

In this case, we need to rearrange the ideal gas law equation to solve for density. Density (ρ) is defined as mass (m) divided by volume (V). So, we can rewrite the equation as ρ = m/V.

Step 3: Convert the given temperature of 22°C to Kelvin. The Kelvin temperature scale is used in the ideal gas law equation. To convert Celsius to Kelvin, add 273.15 to the Celsius temperature.

T = 22°C + 273.15 = 295.15 K

Step 4: Plug the given pressure, temperature, and molecular weight values into the ideal gas law equation to find the moles of chlorine gas (n).

PV = nRT

n = PV / RT

Since the problem gives the pressure as 1.00 atm and the temperature as 295.15 K, and the ideal gas constant (R) is approximately 0.0821 L·atm/(mol·K), we can calculate the number of moles.

n = (1.00 atm) x V / (0.0821 L·atm/(mol·K) x 295.15 K)

Step 5: Convert the number of moles of chlorine gas into grams, assuming the molecular weight of chlorine gas is 71 g/mol.

mass (m) = n x molecular weight

mass (m) = n x 71 g/mol

Step 6: Finally, calculate the density (ρ) by dividing the mass (m) by the volume (V).

ρ = m / V

Since the volume is not given in the problem, you might need more information to solve for the density.