Nuclear decay occurs according to first-order kinetics. A nuclide decays in 23.0 minutes from 12.9 g to 2.04 g. What is the rate constant for the nuclide

Embryos of different species look very similar, which shows that the organisms share a ancestor.

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction

The solubility of barium nitrate is 9.02 g/100 g h2o at 20°c. a 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? a. unsaturated b. saturated c. supersaturated