Final answer:
To calculate the density of carbon tetrachloride vapor at a given pressure and temperature, we can use the ideal gas law equation and rearrange it to solve for density. By plugging in the given values and calculating the expression, we can find the density.
Step-by-step explanation:
The density of carbon tetrachloride (CCl₄) vapor at 0.938961 atm and 125 °C can be calculated using the ideal gas law. The ideal gas law equation is 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.
To find the density, we need to rearrange the equation to solve for density. Density (ρ) is equal to mass (m) divided by volume (V). So ρ = m/V. Substituting PV/RT for n, we can write ρ = (PV/RT)/V, which simplifies to ρ = P/RT.
Now we can calculate the density by plugging in the given values. First, convert the temperature to Kelvin by adding 273 to 125 °C, giving us 398 K. The ideal gas constant R is 0.0821 L·atm/(mol·K). Plugging in these values, we get ρ = (0.938961 atm)/(0.0821 L·atm/(mol·K) * 398 K). Calculating this expression gives us the density of carbon tetrachloride vapor at the given conditions.