The diagram shows a test tube of pure copper(ll) sulfate cuso4 solution during and after the addition of iron fe shavings

Which statement best describes the function of enzymes?

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury