7 1oolSAdd-ons HelpLast edit was made 2 days ago by ERIC MATTSSON100%SharNormal textCalibri10B IUAE = E E E E - E E E X4Editing5Almost done! Finally, to complete this problem set, we are going to turn this into a concentration measurementthat represents the amount of toxin per unit of air (this is another area that is not really a relationship that is usedto measure gas concentration in real life; we're using this to display our grasp of dimensional analysis as well; thereal calculation is a bit too complex for what we know to this point). For our simplified concentrationrepresentation, we will be giving the HCN gas quantity in mol/L (this measurement is called MOLARITY).7.Use the following guidance to calculate the concentration of HCN gas in the air in mol/L at theexplosion site. (there are actually numerous ways to answer this question. We'll look at a couple)The first, and fastest way, is simply to convert your known mass and volume of HCN into theunit MOLARITY (M), or mol/1L. You would do this using your known unit conversion factors:Avogadro's Law, molar mass and the percent composition from question 6 to end in theunits . I'll get you started by rephrasing the question in our familiar parenthesis form:a.(convert)(_g HCN) → ( ? HCN)Another way is to use a combination of dimensional analysis and one of my favorite mathconcepts: Proportionality. Let's break it down:a.What is the known mass of HCN gas and the known volume of air from our sample(question 5 and 6)?b.How many grams of HCN would you find in 1.000 L of HCN gas at STP?There's a second way to get this same piece of information, using your percentcomposition of HCN in 22.41 L of gas (because our polluted air sample is a solution, thepercentage of each gas within any quantity of the air will be the same), you can set up aproportionality. Let me word it a bit differently: What is the mass of HCN that youwould find in 1.000 L of polluted air from the explosion site?C.We can now take that mass amount and ask ourselves this: How many mol HCN are in youranswer to the previous question?d. Lastly, what is the concentration of HCN gas in mol/L(). Evaluate the way this unit iswritten to determine the equation you should use to calculate mol/L?Rate of Dispersion of Toxin to Surrounding CommunitiesNow that we know the initial concentration of HCN at the site of the explosion, we can use that data to calculatethe time it will take for the gas to reach other communities and the concentration of gas that will exist in thosecommunities (as stated earlier, some of what we will be doing here is not reality but, instead, simplified for thepurpose of practicing our new skills).Our task here will be to calculate the time that it will take for the HCN gas to reach the communities that lie aroundthe explosion site. For this lesson, we will just solve for the length of time it will take the gas to reach your offices inTorrance.

Question

Accepted Answer

1 mol/L HCN means 1 mole of HCN is present in 1L of the solution.

(convert)( g HCN) → (? HCN) noth