PLEASE HELP Assuming a lacrosse ball weighs 5.5 ounces and is made of mainly rubber which has a mass of 82.2 g/mol, how many particles are in a lacrosse ball?

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.