Which indicator is yellow in a solution with a ph of 9.8?
(1) methyl orange (3) bromcresol green
(2) bromthymol blue (4) thymol blue

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.)

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

What is one real world example of a colligative property?