1. Which two formulas contain 4 atoms of hydrogen? A. 2 H, CO3
B. H,02
C. C, H6
D. C, H,O2

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?