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Author Question: An unknown nonelectrolyte and nonvolatile compound is dissolved in enough pure water to make 348 mL ... (Read 203 times)

tnt_battle

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on: Nov 18, 2019

Question 1

Calculate the mass of maltose, C12H22O11, contained in 725.0 mL of solution if the measured vapour pressure of the solution is 41.6 mbar at 30 °C. The vapour pressure of pure water at 30 °C is 42.40 mbar; assume no change in volume occurs upon dissolution.
◦ 94.1 g
◦ 265 g
◦ 482 g
◦ 163 g
◦ 329 g

Question 2

An unknown nonelectrolyte and nonvolatile compound is dissolved in enough pure water to make 348 mL of solution. The vapour pressure above the solution drops from 198.7 mbar to 196.7 mbar when 100.0 g of the compound is dissolved at constant temperature. Determine the molar mass of the unknown compound. Assume no change in volume occurs upon dissolution.
◦ 180 g mol-1
◦ 509 g mol-1
◦ 689 g mol-1
◦ 342 g mol-1
◦ 243 g mol-1
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Marked as best answer by tnt_battle on Nov 18, 2019

kardosa007

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Reply #1 on: Nov 18, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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tnt_battle

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Reply 2 on: Nov 18, 2019
Wow, this really help

ryansturges

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Reply 3 on: Yesterday
Gracias!

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