A student is conducting an investigation to determine the identity of an unknown substance. Which of these observations represent physical properties of the substance?

Different isotopes indicate that an element will have different numbers of

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.