How much mass does 1 mol of O2 gas have?

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

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

Chemistry worksheet - i am not sure what they are asking for exactly?