Which of the following statements about igneous rocks is correct
a. intrusive igneous rocks are formed when magma is called above the ground.
b. extrusive igneous rocks are formed when magma is cooled above the ground
c. extrusive igneous rocks are formed when magma is cooled below ground
d. both extrusive and intrusive are formed below ground

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.