Can someone help me rq

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?

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.