Match each root with its meaning. (5 points) 1. grad/gress 2. ject 3. meter 4. junct 5. loc a. place b. to throw c. measure d. to step e. to join

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community