To which of the following variables is change in boiling point directly proportional? A. molarity of solution B. molality of solution C. percent by volume of solution D. percent (mass/volume) of solution

Answered by admin AT 16/04/2020 - 06:00 PM

I believe the correct answer is B. It is the molality of the solution that is directly proportional to the boiling of the solution. This phenomenon is called the boiling point elevation. It is one of the colligative properties of solutions together with the freezing point depression, vapor pressure lowering and osmotic pressure.

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A substance composed of two or more elements in a fixed, definite proportion is a.a homogeneous mixture. b.a heterogeneous mixture. c.a compound. d.a solution. e.an alloy.

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QUESTION POSTED AT 02/06/2020 - 01:58 AM

Describe how oxidation and reduction involve electrons, change oxidation numbers, and combine in oxidation-reduction reactions.

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QUESTION POSTED AT 02/06/2020 - 01:42 AM

Which statement best describes the change that is associated with the enthalpy of solution? Each step of the process is exothermic when the enthalpy of solution is negative. Each step of the process is endothermic when the enthalpy of solution is positive. Two steps of the process are exothermic, and one step is endothermic. Two steps of the process are endothermic, and one step is exothermic.

Chemistry

QUESTION POSTED AT 02/06/2020 - 01:41 AM

Which pairing below does not correctly match the scientist with the contribution to the understanding of the atom? A. Proust and the realization that the elements of compounds are found in certain proportions by mass B. Rutherford and the understanding that the atom has a small, dense nucleus with a positive charge C. Thomson and the law of definite proportions D. Dalton and the initial proposal of the atomic theory of matter

Chemistry

QUESTION POSTED AT 02/06/2020 - 01:36 AM

What volume of 0.3682 M H2SO4 solution is required to react with 0.4198 grams of Al(CN)3 according to the reaction, 2 Al(CN)3 + 3 H2SO4  6 HCN + Al2(SO4)3?

Chemistry

QUESTION POSTED AT 02/06/2020 - 01:34 AM

To which of the following variables is change in boiling point directly proportional? A. molarity of solution B. molality of solution C. percent by volume of solution D. percent (mass/volume) of solution

Answered by admin AT 16/04/2020 - 06:00 PM

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