in an experiment to determine density , students were measuring mass and volume. They found the mass of their substance to be 8.12 g and the volume to be 1.9 cm 3. The actual density was 4.5 g/cm 3. what was their percent error?

What is the chemical formula of the following compound

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.

If an atom has 12 protons and 13 neutrons