What is the total number of atoms contained in 50.0 grams of Helium?

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12

The independent variable in an experiment will be the variable that you o a) change ob) hold constant ng c) observe for changes