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Another mass composition problem

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Uploaded by on Aug 27, 2009

Another exercise converting a mass composition to an empirical formula.

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  • sulphuric acid is the thing you would want least poured on you.....most of the time

  • u sir...are a genius i m gonna nail the test next week inshallah

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All Comments (49)

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  • @lurkern im pretty sure its because you always put a metals or hydrogen (not technically a metal) in front of all non metals and radicals. in this case you have hydrogen sulfate. (sulfuric acid) hydrogen goes before sulfate. and sulfate itself (SO4) i think they write the sulfur before the oxygen because there is less of it. i belive hydrogen can end up anywhere from first to last depending on what types of bonds its using. but please dont take my word for this. this is off my head.

  • @goldensilverstar its still quiet easy even if you didnt use 100 grams. for example if the total mass of the mixture was 75.3, to find the mass of H O and S you just have to divide 75.3 by 100 then times by the percentage of the substance. eg, with sulfur it would be. 75.3 / 100 x 32.65 = 24.58 g. then you can do it with the O and H and see that all 3 values add up to 75.3. after that you just follow the rest of the instructions on this great video to figure out the empirical f

  • Stop making everything fuckin 100grams

  • YOU ARE MY SAVIOR!! learning what my shitty gen. chem. teacher couldnt teach the class all damn semester...forever indebted!

  • wow... why go to the university?

  • its nuclei lol; but anyway thank you SO much my chem teacher is bad at explaining, and your videos have saved my butt

  • I think a light bulb just clicked. Honestly.

    

  • We should pay our tuition to you instead of our horrible profs!!!

  • 1 person is from Port Sulfur hahaha

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