1. A 5.04 mL sample of Cu has a mass of 45 grams. What is the density of Cu? Show units in final answer and show work.
2. What an equality for the density found in question 1.
3. Write two conversion factors for the equality in question 2
4. When you are choosing a conversion factor to use in a problem, how do you know which one to multiply
by?
5. Circle the conversion factor you would use (from #3) to convert 2.1 mL of Cu to grams of Cu.
6. How many grams of Cu are in 2.1 mL of Cu?
7. Write the conversion factor (from #3) you would use to convert 14.3 grams of Cu to mL of Cu.
8. How many mL of Cu are in 14.2 grams of Cu?
9. Silicon has a density of 2.33g/cm^3. If you have 74.0cm^3 sample of silicon, what would be its mass in
kg?

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.

gold is my favorite solid.