What is the molar mass of C3H8 (propane)? Grams

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

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.