an amount of nitrogen undergoes a physical change and increases its volume. what can be known about this…
an amount of nitrogen undergoes a physical change and increases its volume. what can be known about this physical change? the boiling point of the nitrogen increased. the mass of nitrogen increased. the color changed. the density changed.
Answer
Brief Explanations:
Physical changes don't change the substance's chemical identity. Density is mass per volume ($\rho=\frac{m}{V}$). If volume increases while mass remains the same (as it's a physical - change and no new matter is added or removed), density changes. Boiling point is a characteristic property and doesn't change with a simple volume - increasing physical change. Mass is conserved in physical changes. Nitrogen is a colorless gas and a volume - increasing physical change won't change its color.
Answer:
The density changed.