Final answer:
To calculate the density of nitrogen gas at a given temperature and pressure, use the ideal gas law equation and substitute in the provided values. Convert the temperature to Kelvin and the pressure to atmospheres before solving for density. Make sure to use the molar mass of nitrogen gas in the calculation.
Step-by-step explanation:
To calculate the density of nitrogen gas at a given temperature and pressure, we can use the ideal gas law: PV = nRT. In this case, we are given the temperature (125°C) and pressure (755 mmHg) and need to find the density. First, convert the temperature to Kelvin by adding 273 to it. Then, convert the pressure to atmospheres by dividing it by 760. Next, rearrange the ideal gas law to solve for density: density = (molar mass*n)/(volume). Substitute the molar mass of nitrogen gas (28.01 g/mol) into the equation, along with the previously calculated values for temperature (in Kelvin) and pressure (in atmospheres). Finally, divide the given mass of nitrogen gas by the calculated volume to find the density.