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Luda [366]
3 years ago
5

PLSSS HELP ASAPP ITS 200 points and I give brainlist

Chemistry
2 answers:
nirvana33 [79]3 years ago
8 0
A seem good hope it correct 9
Ad libitum [116K]3 years ago
6 0

1. should be A

Explanation:

because that's what I got

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What is the vapor pressure of a 45.0 % solution of glucose, c6h12o6, at 90.0°c, given that the vapor pressure of pure water at t
Vadim26 [7]
Weight of solute = 45 g and weight of solvent = 55 g
M.wt of solute = 180      P⁰ = 526 mmHg
number of moles of solute = 45 / 180 = 0.25 mol
number of moles of solvent = 55 / 18 = 3.05 mol
According to Rault's law:
\frac{P^{0} - P^{s}  }{P^{0} }  =  \frac{n_{solute} }{n_{solute} + n_{solvent}} = 0.25 / (0.25 + 3.05)

\frac{526 - P^{s} }{526} = 0.076

P^{s} = 486.15 mmHg
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3 years ago
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Which of the following you do NOT need to pay attention while using a centrifuge?
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Hello,

Since the radius of the centrifuge is just a design parameter, it wouldn't be a cause of failure because it is used to know how many tubes could be fitted in into the centrifuge. On the other hand, keeping you attention away from other factors could turn into a failure as long as the sample could be poured down or just turn out inadequate for the expected results.

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