An ionic substance is found to have the % composition by mass: 82% mercury, 4.9% carbon, and 13.1% oxygen. a. What is the empirical formula of the compound?

b. The molar mass of the compound is determined to be 489.2 g/mol. Determine the “molecular” formula of the compound.

Do u have the n? or maybe the m?

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

It must be measured in k.hope my answer is to you : )

For lesson: cameras, plant presses, newspaper, paper towels, clip boards, pencils, calculators, field guides, metric measuring tapes, paper, transect squares, colored pencils, ph meters, light meters, computers, etc.for extension: baggies for soil samples collecting, distilled water, hand shovels, beakers, boiled rice, microscopes, well microscope slides or regular microscope slides with cover slips