Determine the mass, in grams, of 0.780 moles of Si (1 mol of Si has a mass of 28.09 g).

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Asample of freon gas has a volume of 2.23 liters, a pressure of 4.85 kpa, and a temperature of -1.36°c. calculate the volume at a pressure of 1.38 kpa and a temperature of 5.5°c. (show work)

If an atom has 12 protons and 13 neutrons