The difference between an allegory and a symbol is that an allegory is a complete narrative that conveys abstract ideas to get a point across, while a symbol is a representation of an idea or concept that can have a different meaning throughout a literary work.
Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters. How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.) The attempt at a solution I said that there are 6.02*10^23 atoms in a mole, and noted that after converting the mass into grams each sphere has .9265 moles. If the Aluminum spheres are uncharged there are 13 electrons per atom.
The molar mass of a substance is the molecular weight in grams. All you need to do is calculate the molecular weight and stick the unit g/mol after the number and that is the molar mass for the substance in question. Calculate the molar mass of Al(NO.(1 x 26.98) + (3 x 14.007) + (9 x 16.00) = 213.00 g/mol. 213.00 grams is the mass of one mole of aluminum nitrate.213.00 grams of aluminum nitrate contains 6.022 x 10 23 entities of Al(NO. Video: How to Calculate the Molar Mass. The World-Wide Web contains molecular weight calculators, both ones that are on-line and programs you can download.n one mole, there are 6.022 x 10 23 atoms. Here's another way: there are 6.022 x 10 23 atoms of carbon in 12 grams of carbon-12. Let's say that real clearly: one mole of ANYTHING contains 6.022 x 10 23 entities. The word entities is simply a generic word.