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Author Question: An unknown compound is composed of 65.44% C, 29.07% O, and 5.49% H. A sample weighing 5.34 g, when ... (Read 45 times)

WhattoUnderstand

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Question 1

An isotonic solution will produce an osmotic pressure of 7.84 atm measured against pure water at human body temperature (37.0 °C). How many grams of sodium chloride must be dissolved in a liter of water to produce an isotonic solution?
◦ 75.5 g
◦ 151 g
◦ 2.58 g
◦ 9.00 g
◦ 18.0 g

Question 2

An unknown compound is composed of 65.44% C, 29.07% O, and 5.49% H. A sample weighing 5.34 g, when dissolved in 60.00 g H2O, lowers the freezing point to -0.600 °C. What is the molecular formula of the compound?  (Kf for water = 1.86 °C/m; C = 12.0, O = 16.0, H = 1.0 g/mol).
◦ C3H3O
◦ CHO
◦ C14H11O6
◦ C5H5O5
◦ C7H5O3


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Marked as best answer by WhattoUnderstand on Jul 8, 2021

Beatricemm

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WhattoUnderstand

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Reply 2 on: Jul 8, 2021
Gracias!


komodo7

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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