The formula X + ZY → XZ + Y shows that O A. X and Y bonded into a more complex molecule.
O B. ZY has decomposed into two smaller compounds.
O C. X is a more reactive compound than Y.
O D. Y has changed into a new compound.

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid