The metric system of units is known as the

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

Compare and contrast physical changes with chemical changes.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.