There are only two isotopes of gallium: ^69ga (68.926 amu) and ^71ga(70.025 amu). the average atomic mass of gallium is 69.723 amu. what is the percent of abundance of gallium-69? show all calculations involved.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

The reactions of photosynthesis occur in the of plant cell? a. mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll

Find the mass, in grams, of 5.00*10^23 molecules of f2