Many insulating materials contain spaces filled with air because air is what type of material

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.