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# I just started Chemistry 2a and I need some advice?

Topic: Problem solving and analysis examples
July 21, 2019 / By Gardenia
Question: I am struggling with these mathematic conversions bc my instructor hardly lectured on it at all. I spent time trying to fgure them all out myself etc. and im not a quiter. My question is: Is this normal? and will I be ok if i dont know some of thebeginning metric conversions. I mean i can memorize the elements etc. and what certan things are. Give me some advice thanks!

## Best Answers: I just started Chemistry 2a and I need some advice?

Deb | 6 days ago
First. Chemistry is like a foreign language. And just like any other foreign language, you need to learn some basics and then practice to become fluent in it. One of the basics is the math. It is called "factor label method" or "dimensional analysis" to chemists. Yes, it will seem strange at first but it's important that you understand this. It will make simple problems trivial and complicated problems simple. You must learn this method and practice it. It's the difference between A/B and CDF students. In high school, I struggled with conversions via the proportion method and often made mistakes. When I went to college, my first instructor on the first day of my first chemistry class told us all "forget proportions. Use factor label method or else". the or else was ZERO points given. It's that important. Spend the time and learn the method. So... let's make sure you understand what's going on. read my explanation here. It'll take about 10-15 minutes. http://answers.yahoo.com/question/index;... now let me give you some more examples http://answers.yahoo.com/question/index;... notice I started with the "given" on the left and converted to the right? notice everything in ( ) is a "unit factor" = 1? notice how I strung along multiple "unit factors"? notice the ³ in (100cm / 1m)³? rule 5 on that first link here's a more complicated problem. http://answers.yahoo.com/question/index;... Ignore the problem. But do look at the math. Can you see where I used "factor label method"? can you identify the "unit factors"? another example. This time read the problem. Does it look difficult? Now look at how I solved it http://answers.yahoo.com/question/index;_ylt=AjjM4giFqm7Ws8fZRrIP65fty6IX;_ylv=3?qid=20100825173025AAUsa47&show=7#profile-info-t7pckqOMaa another problem that looks difficult on the surface. Look for "factor label method" and "dimensional analysis" http://answers.yahoo.com/question/index;_ylt=AklAXUqZpl3g0Z6mkzBCexPty6IX;_ylv=3?qid=20100825183626AAqsvS0&show=7#profile-info-sLipRj8Saa and another http://answers.yahoo.com/question/index;_ylt=AlNsVf28tR0I6g.B_HLpeRjty6IX;_ylv=3?qid=20100824204335AAAyAxa&show=7#profile-info-4L4MERg7aa and another... http://answers.yahoo.com/question/index;_ylt=AvYLLVL5jXQO6TazBdNZBPvty6IX;_ylv=3?qid=20100824210848AASBcIt&show=7#profile-info-ti4WStRAaa look at how complicated the other answers were. This problem took me longer to push "preview" and "submit" than to actually type the answer. and this one. http://answers.yahoo.com/question/index;_ylt=AviE.mccfdJzsWR0CMJSwSXty6IX;_ylv=3?qid=20100824070145AA8DTEp&show=7#profile-info-ne7MQDIRaa notice how I embedded the conversions into the equation? here's another. http://answers.yahoo.com/question/index;_ylt=Apf4RKkRvk6FZT28fZFZglDty6IX;_ylv=3?qid=20100301143353AApWguA notice where I used "factor label method"?.. steps 2,4,5? notice how I used the coefficients of the balanced equation as a "unit factor"? and this one. http://answers.yahoo.com/question/index;_ylt=Ak3kxT4coEVcR97lJpGqxUTty6IX;_ylv=3?qid=20091206104543AA5xiuL see that first equation? notice it looks like a giant factor label equation?. This is more along the lines of dimensional analysis. More advanced. Let's call it "intermediate level". And the way to solve this problem is to look at the dimensions and manipulate them via factor label method to get the answer you need. ******** questions?
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