Mercury-210 has a half life of 10 minutes. What percent is left after 40 minutes?

If you multiply an object's weight by its height, what value do you compute? A. total momentum B. gravitational potential energy C. kinetic energy D. nonconservative energy

Which of the following is a polyatomic ion? Н+ OH+ OH- O2-

Write equations that show the dissociation of the following compounds in water. Include states in your answer. Fecl3 potassium phosphate

Major geological events that occur when plates shift suddenly and released stored energy: A. Volcanic eruptions B. Earthquakes C. Antarctic plate D. Spreading ridges

B. based on your research and observations, why do you think pure (distilled) water does not conduct electricity but tap water usually does?

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.