A given sample of caffeine, C8H10N4O2, has 6.47 x 1022
atoms of carbon. How many atoms of hydrogen in the same
sample?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

14. many depressants reduce small muscle control, making it harder for a. you to steer b. your mind to consider complex problems c. the eye to scan, focus, or stay still d. the kidneys to filter alcohol out of the bloodstream

Which of these is a physical property