How chemical equations demonstrate conservation of mass?

What’s the scientific notation for the number 6,840,000,000

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

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