The source of oxygen that drives the internal combustion engine in an automobile is air. Air is a mixture of gases, principally N2179%2 and O2120%2. In the cylinder of an automobile engine, nitrogen can react with oxygen to produce nitric oxide gas, NO. As NO is emitted from the tailpipe of the car, it can react with more oxygen to produce nitrogen dioxide gas. (b) Both nitric oxide and nitrogen dioxide are pollutants that can lead to acid rain and global warming; collectively, they are called 'NOx' gases. In 2009, the United States emitted an estimated 19 million tons of nitrogen dioxide into the atmosphere. How many grams of nitrogen dioxide is this?

Video transcript

Hello in this video, we're going to be doing some dimensional analysis. So in this problem, we can see that we're talking about aspirin and we're going to be given some values in some type of unit and we want to be converted into some type of other unit. So first I want you guys to notice that were given the 40, tons her year and we want to convert this mass two ounces. So we only want to focus on our mass, which is going to be our tons. So was a direct conversion from tons, two ounces. I'm not sure if you guys know but I have no clue. So what I'm gonna do is not a direct conversion, we're going to take it in baby steps. So first I'll go from tons, two kg, £2 and then two oz. These are just conversions that I know you can do maybe in two steps or one step or even more steps in this. But these are just conversions that I kind of know already. So that's why I'll be using this method or this road map here. So for my dimensional analysis, I'm going to first start off with meg Given Which is going to be my 1000 tons. So we're starting here, then I'm going to go to kilograms. So for every one ton I'm going to have 1000 kg. So you can see that the tense is going to go ahead and catch up perfectly. So It's all being multiplied. Alright, so done with the kg. Now we're gonna go £2. So For every one kg there's going to be £2.20. And again, sorry, this is A B. All right, so you can see how our kilogram unit will cancel out nicely. So we're done with the pound. Lastly our last stop will be our ounces Again. This is being multiplied. Alright, so every £1 There's going to be ounces. So answers abbreviated is cozy and you can see here again that the pounds will cancel it nicely and the answer will have the ounces as our units and that's exactly what the problem asked for us is convert the mass two ounces. Alright, so putting this into my calculator, I'm going to go and get a value Of 1. Times 10 to the nine power ounces. And that is going to be my final answer for this problem.