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It may delete a post erroneously. We ban all bots. If the amount of mercury in a polluted lake is 0. The lake has a surface area of mi2 and an average depth of 20 ft. I got kg, but the answer is apparently 7x10 5 kg. I think I might have messed up from square miles to milliliters--can someone walk me through this?

Did I screw up the conversion to square kilometers? First of all, the conversion from km to mm is 10 6, so km 3 to mm 3 is 10 You properly squared the conversion factor. That is something people sometimes miss at first. In orig post you said Hg was 0.

Please check which you intend. Why not see if you can make use of these comments. If you get their power of 10, but 6 vs Not so good; you have done it fine, by keeping extra digits, and rounding only at the end.

But maybe they did not. If we still have power of 10 issues, then we need to look more carefully. Could someone just walk me through the problem? I ended up with like 0. Could the answer be a typo? You can fill out the digits later. Why not you try to it on the side, one step at a time.

Try to see what you did wrong. These things can get confusing, but they are basic. Remember 10 9 ug in one kg. Edit just saw your work below. Your math and logic are right but your orders of magnitude are wrong in the conversions. Use of this site constitutes acceptance of our User Agreement and Privacy Policy. Log in or sign up in seconds. Submit a new text post. Please try Google before posting. The title should be of the form "[Level and Discipline] General Topic. What does your instructor want you to accomplish?

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Accept answers at your own risk. We use automoderator for a few things. It may delete a post erroneously. We ban all bots.

The catalyst matrix contains 6. CO is present at about 1. You want the catalytic converter to convert all of the CO g to CO2 g before passing it through the rest of the exhaust system.

How many g of CO will pass through your catalytic matrix per minute? B When operating properly, each gram of Pt can react 2. How many g of Pt catalyst will you need? Here is where I start to go wrong, I keep getting 3.

The program keeps marking all my answers from here on as incorrect. I think I might just be having an issue with this one and since all the others build off of this question, its messing up the rest of my set. How much surface area will this much catalyst matrix have? D The catalyst matrix has a density of 0. What volume of catalytic matrix is needed to reduce CO emissions?

What volume of catalytic matrix would you need to reduce the CO emission in this automobile? You just solved this question for the automobile If you make sure all your units cancel correctly, you should be confident you have the right answer. Volume of catalytic matrix needed for the SUV?

If you can tell me where you are getting 3. Remember this is how much platina there is in a gram of matrix, and you have the amount of platina, so getting the amount of matrix just involves dividing by the ratio.

Which gives you Use of this site constitutes acceptance of our User Agreement and Privacy Policy. Log in or sign up in seconds. Submit a new text post. Please try Google before posting. The title should be of the form "[Level and Discipline] General Topic. What does your instructor want you to accomplish?

Dimensional Analysis can be very useful when you come across a situation where you forget a formula that applies to certain values.

Dimensional analysis is one of the first topics covered in many chemistry classes. Bone up on your dimensional analysis skills with the best chemistry resources online. You can practice unit conversions with a free worksheet, watch a video, and more.

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Email Based Homework Assignment Help in Dimensional Analysis Transtutors is the best place to get answers to all your doubts regarding d imensional analysis, rules for dimensional analysis, its applications and limitations with solved examples. View Homework Help - Homework 1: Dimensional Analysis from CHEM 2a at University of California, Davis. KEY Dimensional Analysis Worksheet Suggested text book problems: Ch 1. 27, 29, 33, 35, 39 1. if.