An atom of sodium has 11 protons, 11 electrons, and 12 neutrons, what is its atomic number and mass number?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Describe the interaction that occurs between two objects with the same electrical charge.

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.