If a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 30 years? a) 50 g b) 6.25 g c) 12.50 g d) 25 g

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

How many miles of water are produced if 5.43 mol pbo2 are consumed

What are four significant sources of ghgs that come from wostem washington?