When dissolving a metal in sulfuric acid, hydrogen, a highly flammable gas, is given off. you are dissolving equal amounts of different metals to compare the volume of hydrogen gas produced. for safety purposes, your teacher tells you to wear an apron, gloves, and goggles. which of the following safety procedures would also be needed?

a. avoid sparks or open flames.
b. wear a gas mask.
c. work away from direct sunlight.