Which list of lab equipment and tools is a complete list needed to heat a reaction in a beaker with high heat? a. beaker, ring stand, iron ring, Bunsen burner, beaker tongs, and wire gauze

b. beaker, ring stand, utility clamp, beaker tongs, and Bunsen burner

c. beaker, hot plate, Bunsen burner, and beaker tongs

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.

What are the names of these two interactions with cattle and how do they differ from each other