Use PV = nRT to derive a formula for the density of gas in g/L that includes molar mass in g/mol as well. Show all steps in the derivation.

Which of these conditions most likely produces an unstable isotope?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work