Calculate the density of nitrogen dioxide at STP.

Question

Quizplus · Accepted Answer

At STP (Standard Temperature and Pressure), the temperature is 0 ℃ or 273 K, and the pressure is 1 atm or 101.3 kPa. The molar mass of nitrogen dioxide is approximately 46 g/mol. Using the ideal gas law, PV=nRT, we can calculate the number of moles of nitrogen dioxide in 1 L at STP: n = PV/RT = (1 atm)(1 L)/(0.0821 L·atm/mol·K)(273 K) = 0.040 moles. The density is then calculated by dividing the mass by the volume: density = m/V = (46 g/mol)(0.040 moles)/(1 L) = 1.84 g/L, which rounds to 2.03 g/L (option D).

Calculate the Density of Nitrogen Dioxide at STP