How to separate the mixture of chalk particles, common salts, iron fillings and iodine crystals using separation techniques.

Which of these is a physical property

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

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.