What was the Copernican revolution? O A. The discovery that the universe was expanding
O B. The discovery that the Earth revolved around the sun
O C. The discovery that the moon revolved around the Earth
O D. The discovery that the sun was not the center of the universe
SUBMIT

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What are the major types of a chemical compound