A beaker contains 450 g of water if 9.2g of calcium fluoride is added what is the molality concentration of the solution

Radioactive cobalt-60 is frequently used in treating cancer. It took 24 years for a 10 gram sample to decay to 0.625 grams. What is the half-life of the sample?

Explain why indicators are useful for measuring pH

Our Sun is one star in the which may contain about 200 to 400 billion stars and measure about 100,000 light years in diameter. * O Messier Galaxy O Andromeda Galaxy O Milky Way Galaxy O Comet Galaxy

If 2 objects have the same volume of 10cm3 and object A has a mass of 2 grams and object B has a mass of 4 grams, how do their densities relate to one another? I need a step by step explanation also. I don't fully understand the subject.

What does the pH scale measure? A. The strength of a base B. How much of a compound was put in C. The amount of H + ions in solution D. The strength of an acid

An electron charge e mass m and a positron charge e mass m revolve around their common center of mass under the influence of their attractive coulomb force Find the speed v of each particle in terms of e m k and their separation L

Find the density of an object with a volume of 2.5 cm3 and a mass of 8.0 g.

True or False: DNA is our genetic make-up. It is why we have a certain eye color, and hair color, etc.

Which hybrid orbitals would be formed if one s orbital and three p orbitals combined?

The way light bounces off a minerals surface is describe by the minerals