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

Chemistry Challenge #1 ..............................Chemist________________________

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) = ...........................................__________mol
3.45 grams of calcium chloride (CaCl2) = ...............................................__________mol
8.38 x 10^-4 mol of strontium hydroxide (Sr(OH)2) = ...............................__________grams
3.30 moles of ozone (O3) = ....................................................................__________molecules
7.77 x 10⁴⁵ molecules of ammonia (NH3) = ............................................__________Liters
34.5 grams of hydrogen sulfide (H2S) gas = ............................................__________milliliters
2.29 x 10⁵⁴ molecules of ethylene oxide (C2H4O) gas = .........................__________Kg
One mole of fluorine gas (F2) = ..............................................................__________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:

___________ is an odorless gas that is very poisonous to you and your friends. It displaces O2 molecules on the human RBC.
___________ is a gas that filters Solar UV radiation in Earth’s stratosphere, protecting humans from skin cancer.
___________ 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!)
___________ 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.
___________ is a poisonous pale yellow gas located in Group 17 on the Periodic Table.
___________ 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.
___________ 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.
___________ 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.

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!).