Why is the mass of a carbon atom written as 12.011 amu on the periodic table? Why can’t the average atomic mass be a simple average (add masses and divide by 3) of the three naturally occurring isotopes: carbon-12, carbon-13 and carbon-14?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers