Compare 6.022×10^23 (Avogadro’s Number) and the population of the Earth, which is about 6.02 billions. How many planets (like Earth) would we need to populate to 6.022×10^23 people

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

How many grams are in 68.2 molecules of br2?

Who examines and coordinates the cleanup of polluted sites?