PLEASE HELP THIS IS OVER DUE AND I NEED TO GET IT DONE IM REALLY BAD AT CHEMISTRY In which state of matter (Solid, liquid, or a gas) do atoms/particles move the fastest?

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

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.

During which of the following phases of the moon do we see the left half of the moon as lit? full moon first quarter moon gibbous moon third quarter moon any is greatly : )