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The colourless liquid is impure because the boiling point of pure water has a fixed boiling point of 100 degrees.

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The boiling point of pure water is 100 degrees celsius therefore it's impure. Impure substances boiling point is higher than 100 degrees

extension: pure substance only consists of one element

impure consists of two or more elements

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The colorless liquid is impure as the boiling point is 105 celcius where as pure substances only can reach 100 celcius

the difference between pure and impure is pure consist of one atom while impure is a mixture of two or more substance

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impure water boils at a different temperature because the other substances have different boiling points.

a pure substance is a material that consist of only one type of particle (elements, compounds, etc.)

An impure substance would consist of different substances.

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A colourless liquid with a boiling point of 105 degree Celsius is impure.Pure substances only have fixed boiling points/melting points.

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It’s not pure, because the colorless liquid, water has 100’c in boiling point, but it’s over.

Impure substance has higher boiling point and lower melting point than pure substance. How to determine is boiling both substances and check which substance boils faster

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Impure substance higher boiling point and lower melting point. If you don't know what is pure and impure, boiling both of them and check which of them is boiled fast

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boiling point of a pure substance is 100 degrees and freezes at 0 degrees while an impure substance always melt at a lower temperature and boil at a higher temperature than pure substances.

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Most: The liquid (water) is impure as it has a boiling point higher than 100 degrees celcius/above the normal boiling point of normal water

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The difference between pure and impure substances is that impure contains more than one in the substance and their boiling & melting points aren’t the same. We know a substance is pure if it is made out of only one type of element or compound and has a constant,specific melting and boiling point

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pure substances boil at 100degrees and freeze at 0 impure substance boils higher than 100 degrees and freezes below 0 degrees

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Most: The colorless liquid is impure because the boiling point is higher than a 100 Celsius

Extension: Pure - One type of substance

Impure - more than one type of substance

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Impure substances tend to have higher boiling points and also have lower melting points compared to those of pure substances. However, it is hard to tell if a substance is pure or impure if we do not know the temperqture of the pure substance that the impure substance is being compared to.

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Pure substance has a boiling point of 100 degrees Celsius and a freezing point of 0 Celsius. An impure substance boil over 100 degrees Celsius and freezes below 0 degrees Celsius.

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No, a colorless liquid with a boiling point of 105°C is not pure. Pure substances have a specific, fixed boiling point (pure water boils at 100°C), whereas the presence of impurities raises the boiling point.

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It is not pure because pure water or pure liquid will only boil at a 100 degrees celcius

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Most : It is impure,because the boiling point of pure water is at 100 degrees celcius. Pure substances contains the same chemical substance however impure does not.

Extension : The difference between pure and impure substance is that pure substances have constant chemical composition and impure substances boil or melt over a range of temperatures.

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Can't tell because we are not sure on what the liquid is and there is not a lot of information.

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Most - It is unknown because it is not mentioned what the substance is. If the liquid is water, then the substance would be impure as water boils at a fixed temperature of 100 degrees Celsius.
Extension - Pure substances have a fixed melting or boiling point while impure substances boil or melt over a range of temperatures.

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It is not pure because pure water or pure liquid will only boil at a 100 oC however this substance's boiling point is 105 oC.

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We are not able to tell if the colorless substance is pure or impure since we do not know its pure boiling temperature or the name of the substance. This is because there are many other substances that could also have a melting point of 105 degrees.

Extension:
pure substances only have one element in them and have a sharp melting temperature. Impure substances are a mixture of two or more elements and have a range of melting temperatures.

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The liquid of a 105C boiling point would be impure, because if there was no other substance dissolved in it, it would have been at 100C. If it is suspected not to be water, we would need to distill it to see if there is any impurities that have not evaporated

EXT: Impure substances have higher boiling points and lower melting points than pure substances

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Most - Depends/Not sure, we do not know what this colourless liquid is. Different liquids have a different boiling point.

Extension - Pure substance has a fixed boiling point, whilst impure substances could be high or lower

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Most - It is impure because impure substances boil at one hundred degrees. However this boils at one hundred and five degrees.

Extension-  Pure substance has a fixed boiling point. But, impure substance boiling point could be various. It could be more higher temperature than pure substance

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most- It depends, this is because the "colourless liquid" could be any substance, with any boiling point. However, if this colourless liquid boils and condenses at precisely 105oC, Then it is indeed pure. If you conduct multiple tests with the colourless liquids and results in multiple boiling points that varies, then it is impure.

Extention: An impure substance wouldn't have a precise boiling/melting point, impure substances wouldn't have a sharp boiling/melting point.

A pure substance would have a specific boiling/melting point, also known as a sharp boiling/melting point.

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It is impure because pure water boils at 100 degrees while this liquid melts at 105 degrees. The difference between pure and impure substances is that pure substance has the same chemical substance while impure does not

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It isn't pure as a boiling point is usually at 100. When something is impure, the boiling temperature is higher.

Find the melting point of a substance, pure substances have sharp melting points. mixtures melt over a range of temperatures/ boiling it and checking if there are any remainings.

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The colorless liquid is impure, you can tell because it's boiling point is higher than 100 degrees Celsius.

Pure substances have a sharp melting and boiling point and impure substances have a range of melting and boiling points. Scientists can tell by either experimenting the substance's different boiling and melting points or they can use chromatography paper to see if it is made up of 1 ion (Pure) or 2 or more ions (Impure).

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It is impure because water's boiling point is 100oC. However, it that liquid has a boiling point of 105oC. Therefore, it is impure.

Pure substances have one type of atom. Meanwhile, impure substances has at least two different atoms. To tell if the substance is pure, you have to boil it to find out. Since pure substance's boiling point is 100oC, anything above that is impure.

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Impure, because this substance's boiling point is 105 degrees Celsius and the boiling point of a pure substance is 100 degrees Celsius.
Extension
Pure substances have a boiling point of 100 degrees Celcius. Impure substances have a range of boiling points.

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It is impure, because pure water boils at 100 oC but if it impure it will take much longer to boil.
Extension: Pure is when there is nothing chemically mixed into it and impure is when something is mixed into it just like chocolate. we can tell that the substance is pure when it boils when it hits 100 oC but if it boils above 100 oC it is considered impure.

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you cannot know because it can be a different liquid other then water and the only thing you know is it is colourless

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Cant tell because of how information is shown

A pure substance has a constant chemical composition. and an impure substance does not

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It is impure because a pure liquid's boiling point is lower than that of an impure liquid. The impure's is 105 while the pure's is 100 degrees.

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It is impure because the boiling point of a pure water would be at one hundred degrees Celcius.

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I cannot tell if it's a pure liquid because other liquids also boil at 105 degrees it does it say what liquid it is. pure substance only have the same types of atoms while impure substance have other types of atoms in it.

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Most - Impure. Because pure substance's boiling point is 100 degrees Celsius instead of 105 degrees Celsius.

Extension - Impure substance has higher boiling and lower freezing point then pure substance. Also a pure substance has a constant chemical composition.

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Most: A colourless liquid was found to have a boiling point of 105 oC. Is it pure? Explain how you know this.

Extension: What is the difference between pure and impure substances? How do we know if a substance is pure?

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Explain the difference between pure  and impure substance. How can scientists tell the difference?

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Explain the difference between pure  and impure substance. How can scientists tell the difference?

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Mrs Willis