1. Calculate the weighted average mass of a sample size of 5 chocolate bars with a mass of 8.82 g each, 20 candy bars with a mass of 9.00 g each, and 10 peanut butter cups
with a mass of 8.08 g each.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Explain that newton first law,second law and third law of motion?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.