Chemistry 2-27-09 Empirical Formulas
CHEMISTRY: Hallelujah for Fridays! You did a really good job today on emipirical formuals. Make sure you practice them before Monday so you won’t forget everything. Also, don’t forget lab reports due Monday. Make sure your observations are complete. Include everything you measured and all of your calculations. Have a great weekend – I can’t believe February is already over!
February 27th, 2009 at 10:55 PM
How do you find the empirical formula?
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February 27th, 2009 at 10:56 PM
what do i do if i have a set of numbers that is not less than .1 or greater than .9? How am i supposed to find the number of moles?
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February 28th, 2009 at 1:22 AM
I am still a little about set up the equation for empirical formula. Is it a combination of the three we have already learned this chapter.
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March 1st, 2009 at 11:52 AM
what is the science in the news topic
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March 2nd, 2009 at 10:00 AM
Anna:
You divide by the lowest one!!
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March 2nd, 2009 at 10:01 AM
When using the empirical formula, do you divide by the highest or the lowest one?
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March 2nd, 2009 at 2:42 PM
You divide by the lowest:)
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March 2nd, 2009 at 5:33 PM
What are Polymers ?
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March 2nd, 2009 at 6:06 PM
Leslie: polymers are long chains of monomers linked together, they can be synthetic or manmade. examples:rubber,plastic,styrofoam
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March 2nd, 2009 at 6:31 PM
on tonight’s hw, #52, do we have to find more than one E.F.? or do you use oxygen and nickel as the mass. on the first step we use those as our percents??
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March 3rd, 2009 at 8:06 AM
Hey Ms. Skinner, what is so special about the molecular formula?
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March 3rd, 2009 at 9:42 AM
what is the first step in finding a molecular formula?
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March 3rd, 2009 at 9:43 AM
what is the second step to do empirical formulas?
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March 3rd, 2009 at 9:46 AM
Macy the second step to writing empirical formulas is changing the mass of the element to moles
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March 3rd, 2009 at 10:28 AM
How many multiples can an empirical formula have?
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March 3rd, 2009 at 1:35 PM
abby,
first you have to change the percentages to masses (g). And if you’ve already been given the mass, then you can go straight to step two.
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March 3rd, 2009 at 5:31 PM
why are molecular formulas not used on metal compounds
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March 3rd, 2009 at 6:54 PM
whats so special about the condensation polymer?
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March 4th, 2009 at 3:47 PM
Audrey: It is formed by a differant reaction than the other polymers. A condensation reaction.
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