Final answer:
The statement that all that is needed to identify a substance is the mass and volume of a sample is not accurate. While mass and volume are important properties of a substance, they alone are not sufficient to identify it.
Step-by-step explanation:
The statement that all that is needed to identify a substance is the mass and volume of a sample is not accurate. While mass and volume are important properties of a substance, they alone are not sufficient to identify it. There are many substances that can have the same mass and volume, so additional information is needed to correctly identify a substance.
For example, consider two substances with the same mass and volume: copper and iron. Both copper and iron have similar densities, so their mass and volume measurements may be the same. However, copper and iron have different chemical properties and reactions, so additional tests would be needed to accurately identify them.
Therefore, while mass and volume are useful properties in the identification of a substance, they are not enough on their own and additional tests are necessary to determine the nature of a substance.