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kodGreya [7K]
3 years ago
5

The condensed structural formula for 2,2,3-trimethylbutane is _____. ch3c(ch3)2ch(ch3)2 ch3ch2ch(ch3)c(ch3)3 ch3c(ch3)2c(ch3)3 c

h3ch2(ch3)ch(ch3)2

Chemistry
1 answer:
Mrac [35]3 years ago
6 0
The chemical structure of 2,2,3-trimethylbutane is shown as attached document. In a condensed structural formula, a branched chain is shown in bracket (). 

So according to the chemical structure, the correct condensed structural formula for this molecule is CH3C(CH3)CH(CH3)2

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A 0.4021-g sample of a purified organic acid was dissolved in water and titrated potentiometrically. A plot of the data revealed a single end point after 19.31 mL of 0.1243 M NaOH had been introduced. Calculate the molecular mass of the acid.

Step 1: Data given

Mass of the sample of a purified organic acid = 0.4021 grams

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Volume needed to reach the end point = 19.1 mL = 0.01931 L

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Moles NaOH = molarity NaOH  * volume

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Moles acid = 0.00240 moles

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Molar mass = 167.5 g/mol

The molar mass of the acid is 167.5 g/mol

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