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There are fewer solvent molecules at the surface that can evaporate.

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Q: A reduction of vapor pressure occurs with the addition of a nonvolatile solute to a solvent because?
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Why is vapor pressure reduced in a solution with a nonvolatile solute?

Yes, nonvolatile solute lowers the vapor pressure and increases the boiling point. For instance, salt is an example of an nonvolatile solute in water. Ever wonder why salt is used in icy roadways in the winter? Because salt help inhibit the crystallization of water particles into ice by lowering the freezing point.


Which substance is left behind after you evaporate sugar solution?

Sugar is 'left over' because it is nonvolatile


How does the addition of solute affect freezing and boiling point and vapor pressure on a solvent?

A non-volatile solute affects increases osmotic pressure. This is a colligative property. There will be a higher osmotic pressure required to prevent the solvent from flowing into the solution because the solvent has a higher chemical potential without solute in it.


Why do geographers study population density of a country in addition to it's total population?

Because its the density that puts more pressure on the resources


What chemical change occurs when more reactive substance replaces a less reactive substance in a compound?

reduction or oxidation example: (this isn't a real reaction) ClO + CS4 --> CO + ClS4 the chorine has been reduced, because the carbon is more reactive the carbon has been oxidised, because it is more reactive oxidation = the addition of oxygen reduction = the subtraction of oxygen


Why reduction reaction is called reduction?

Because it gains electrons ,therefore its valency decreases : it becomes Negative


What is Nonvolitale RAM?

There is no non-volatile RAM, because a hard-drive is what is nonvolatile, because it retains its memory even after there is no power to the computer. RAM is volatile, because when there is no power all data that was stored in the RAM is lost.


Why Blood sugar testing are more important than Blood Pressure?

Because early intensive glucose lowering not only indicate the end of diabetes but also reduction in mortality from chances of myocardial infarction.


Point reduction vs weight loss on Weight Watchers?

Point reduction helps, because it helps with portion control.


Why is NO3 to NO a reduction?

because the oxidation state of N decreases


What is the relationship between intermolecular forces and volatilit?

A volatile liquid is easy to vaporize because there are weak intermolecular attractions between its molecules. A nonvolatile liquid is difficult to vaporize because there are strong intermolecular attractions between its molecules.


Why does electrolysis involve oxidation and reduction?

because all the elements has oxygen in it.