1) What is the molarity of a solution that contains 2.0 moles of lithium fluoride dissolved in 100 mL of solution?

b. atoms in metallic solids are not arranged in a regular pattern

explanation:

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

i just learnt this recently but i need to look through my notes again