A gas cylinder contains exactly 15 moles of
oxygen gas (O2). How many molecules of oxygen
are in the cylinder?
0 4.01 x 1022 molecules
0 6.02 x 1023 molecules
9.03 x 1024 molecules
2.89 x 1026 molecules

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum