A helium gas has a pressure of 60 mmHg, a volume of 3.0 L, and at a temperature of 30 o C. What is the mole of the helium gas? (R=62.26 mmHg L/mol K)

How many molecules are in 6.0 moles of methane

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

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.