What is the mass of 647 L of NO₂?

To calculate the mass of 647 L of NO₂, we need to know the density of NO₂ at the given conditions.

The density of NO₂ at standard conditions (0°C and 1 atm) is approximately 2.62 g/L.

Therefore, the mass of 647 L of NO₂ can be calculated as:
Mass = Volume × Density
Mass = 647 L × 2.62 g/L
Mass = 1695.14 g

Therefore, the mass of 647 L of NO₂ is 1695.14 grams.