A carbon -14 sample starts with 100 atoms, and 5,730 years later , there are 50 atoms. What is the half life of carbon-14?

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

How have the greenhouse gasses increased from the year 2000 to 2018