One reason this “Challenge” is on the webpage is to cut down on the use of paper.

Chemistry Challenge #1 Answers Answers Answers

Instructions: Work with another chemist (i.e. a student at FA) until you both come to consensus with all your answers. Visit the science office to see the correct answers, or wait a few days and the answers will appear in the blanks on this worksheet.

ALL CALCULATIONS AT STP (0.00 degrees C and 760 mm Hg on barometer).

22.4 Liters of carbon monoxide gas (CO) = ...........................................1.00 mol
3.45 grams of calcium chloride (CaCl2) = ...............................................3.12 x 10^-2 mol
8.38 x 10^-4 mol of strontium hydroxide (Sr(OH)2) = ...............................0.102 grams
3.30 moles of ozone (O3) = ....................................................................1.99 x 10²⁴ molecules
7.77 x 10⁴⁵ molecules of ammonia (NH3) = ...........................................2.89 x 10²³ Liters
34.5 grams of hydrogen sulfide (H2S) gas = ............................................2.27 x 10⁴ milliliters
2.29 x 10⁵⁴ molecules of ethylene oxide (C2H4O) gas = .........................1.67 x 10²⁹ Kg
One mole of fluorine gas (F2) = ..............................................................38.0 grams

Information for your pleasure: (N.B. The information give below will not be a part of the calculating contest, but will surely make your mind a splendid place to visit.)
Match each of the chemicals used in the “Challenge” above with one of the statements below:

____CO_____ is an odorless gas that is very poisonous to you and your friends. It displaces O2 molecules on the human RBC.
____O3_____ is a gas that filters Solar UV radiation in Earth’s stratosphere, protecting humans from skin cancer.
____NH3____ is a molecule that’s very soluble in water. It is mixed into “Windex.” (You can smell when you clean the windows. But I don’t do windows!)
____C2H4O__ is a gas used to sterilize medical equipment, but it is highly toxic to humans causing lung and tracheal irritation, and if long term exposure it is carcinogenic.
____F2_____ is a poisonous pale yellow gas located in Group 17 on the Periodic Table.
____CaCl2__ is produced in large quantities by Dow Chemical Co. It is used to melt ice on the path in front of your house, in the winter.
____H2S____ is an awful smelling gas that is also highly poisonous to humans. It is used in pranks to make “stink bombs” by people who do not know how poisonous it is.
__Sr(OH)2__ is a solid that when dissolved in water will increase pH (It’s a base!) and is used to absorb CO2 gas from the atmosphere.

If you have come this far,
then your mind is becoming a splendid place to visit!

All these chemicals can be used to improve the quality of life. However, these chemicals when not controlled or when not used property become pollutants.
A pollutant is a chemical that harms any form of life, particularly humans and their pet dogs. That was supposed to make you laugh, at least grin. If it did not, then realize that pollutants are harmful to all marine life from fish to oysters, and all terrestrial life including lions, tigers and bears (Oh my!).