WEBVTT
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All right, guys, We're doing problem. Number
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engaged of chapter three B in chemistry to molecular approach
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. Combustion house is in apple in a hydrocarbon used
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in mob. All purchases 8.8 is your O gram
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Seiko two and 1.44 This is it. I'm going
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for four grams, actually, the empirical formula pineapple
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plane. So we're going to take the mass of
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our CEO, too, and we're gonna multiply by
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a ratio issue of the mass of of the molecular
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weight of carbon over the milk. What a carbon
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dioxide carbon is 12. Carbon dioxide is 44.
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That's gonna give us our mass percentage. This is
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gonna be the mass percentage of carbon. So that
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fraction multiply by the overall mass will give us just
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the mass of our carbon gonna be equal 2.44 grams
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carbon and for water one point for four grands times
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to over 18. Mating too. Because we Each
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hadron is a molecular weight of one gram per mole
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and we have two engine, so that's gonna be
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equal to zero 0.16 gramps. And next we're gonna
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convert this. Two moles. 2.442 point four grams
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guys, one more per 12 grams equals zero 0.2
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moles. So zero 21 6 grams. That's one
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more. Her one grand, 0.16 moles. So
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now we're gonna to do the empirical formula, we're
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gonna divide each by the least number of moles.
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That's gonna be zero 0.2 over 0.16 This allows to
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find the ratio of carbon do hydrogen 1.2 bye.
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And this one's gonna be to your 0.16 over 0.16
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which is equal to one. And as you can
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probably understand, you can't have 1.25 five carbon atoms
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because you can't have a fraction of a car.
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But I'm gonna leave. It's either and Adam where
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it is. So we're gonna multiple. We're going
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to get us to it as, uh, next
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hole number. So we're gonna multiply everything by four
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. So 1.255 times for that's gonna be five.
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You have one time for its going before. That
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means our empirical formula is gonna be C five age
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for, And that's not how we do. You
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just have to understand how these different equation equations work
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. You have to understand how to relate the mass
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percent to the massive CIA to mass massive order.
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And then I understand I had to find your empirical
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formula.