empirical formula and molecular formula

Question 1

what are the steps to the empirical formula?

Answer 1

Write down the symbols of all the elements present

Assume the mass of the sample is 100g and therefore all percentages of elements present become grams

Convert masses to moles

Find the simplest whole number ratio of the atoms by dividing all numbers of moles by the smallest number of moles

If necessary, multiply all numbers by a factor to convert all numbers to whole numbers

Question 2

what is the molecular formula?

Answer 2

((𝑀𝑜𝑙𝑒𝑐𝑢𝑙𝑎𝑟 𝑀𝑎𝑠𝑠)/(𝐸𝑚𝑝𝑖𝑟𝑖𝑐𝑎𝑙 𝑓𝑜𝑟𝑚𝑢𝑙𝑎 𝑚𝑎𝑠𝑠)) X Empirical formula

Question 3

what is the compound the relative molecular mass based on?

Answer 3

carbon-12 isotope

Question 4

what is the formula for moles

Answer 4

mass/molar mass