Find the number of moles and the number of representative particles for each problem. 18) 5.00 g of H2

19) 187 g of Al

20) 0.000264 g of Li2HPO4

21) 333 g SnF2

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

All motion is caused by force? true or false

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element