Which of these is indication that a chemical reaction has occurred?

a. freezing of a substance

b. melting of a substance

c. boiling of a substance

d. formation of a preciptate

What is the number of atoms in 3.54 mol s

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what