1400 J of heat energy is added to a sample of iron. The temperature of the sample rose from 16 C to 20 C. How many moles of iron were used?

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

What is another way to determine mass times acceleration?

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils