What is the smallest part of a compound that retains the properties of that compound? an atom a molecule a solution an element?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %