In the lab, Sara put a piece of zinc, Zn, in a blue solution of copper (II) sulfate, CuSO4, and left it overnight. When she returned the next day, the solution was clear and the zinc had turned an orange-brown color. What kind of chemical reaction had occurred?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Which best describes how johannes kepler developed his laws of planetary motion

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.