In a chemical reaction, atoms are rearranged to form new molecules. However, atoms are neither created nor destroyed. What happens to the total mass of the atoms involved in a chemical reaction?
A.
It will stay the same no matter how the atoms are rearranged.
B.
It will increase if a new compound is formed during the reaction.
C.
It will decrease if two molecules combine to form a single compound.
D.
It always changes as the atoms are rearranged into new molecules.

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose