Americium-242 has a half-life of 6 hours. If you started with 24 g and you now have 3 g, how much time

has passed?

What does NOT change when a solution is diluted by the addition of solvent?

You investigate the density of a chemical solution and get the results: 3.4 g/mL, 3.6 g/mL, and 3.7 g/mL. If the true density of the solution is 4.4 g/mL, what can be said about your results?

Only metal alloys form solid solutions. True False

Most high mountain rangers are composed of

What is the maximum number of moles of H2O that can be produced when 2.0 moles of NH3 are completely reacted

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?