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A pure substance is a substance that consists solely of the same atoms/molecules.

So a volume of water that contains only H2O is a pure substance. A block of iron that contains only Fe atoms is pure substance. A pure substance can be composed of atoms or molecules as I said before BUT they have to be exactly the same.
A substance that has constant chemical composition and characteristics

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10y ago
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1w ago

To classify a substance as pure, one must know that it is made up of only one type of particle, such as atoms or molecules, and that it has a consistent chemical composition. Pure substances have distinct physical and chemical properties that differentiate them from mixtures.

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15y ago

A pure substance that cannot be broken down into any other substances by chemical or physical means Hope that can help!!

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12y ago

element or compound

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Q: What must someone know in order to classify it as a pure substance?
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Continue Learning about Natural Sciences

What measurements must be known in order to find the density of a substance?

To find the density of a substance, you need to know its mass and its volume. The mass is usually measured in grams or kilograms, while the volume can be measured in cubic centimeters or milliliters for solid objects, or in liters for liquids. By dividing the mass by the volume, you can calculate the density of the substance.


1 liter is how many kiloggrams?

The weight of 1 liter of a substance in kilograms depends on the density of the substance. To convert, you would need to know the density of the substance in order to calculate the weight in kilograms.


.2mL is equal to how many micrograms?

The conversion from milliliters (mL) to micrograms (μg) depends on the density of the substance. Without knowing the density, it is not possible to provide a direct conversion. You would need to know the density of the substance in order to make the conversion.


A substance that contains only 1 type of particle is a?

a pure substance


What info would you need to know about a sample of air before you could classify the sample as a solution suspension or colloid?

To classify a sample of air as a solution, suspension, or colloid, you would need to know the composition of particles in the air. Solutions are homogeneous mixtures where one substance is dissolved in another, suspensions have visible particles that settle out over time, and colloids have evenly dispersed particles that do not settle. By analyzing the size and behavior of the particles in the air sample, you can determine its classification.

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