The mole is a unit which expresses a?

How does chemistry affect our world? a. chemicals makes our world more polluted. b. chemicals keeps us healthy. c. chemicals can or hurt our world. d. chemicals make our world safe to live in.

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

How do you lengthen a pattern piece? (family and consumer science, sewing)