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If 2 pure substances have the same density are they same substance?
Wiki User
∙ 10y ago
No, at a different temperature and pressure the volume of any substance increases or decrease (depending on Temperature and Pressure). Also the severity of the volumetric change depends on the state of the substance. Because density=mass/volume and the volume changes while the mass doesn't the density WILL change slightly in solid phase, noticeably in the liquid phase and significantly in the gas phase regardless of weather or not the substance is pure
Wiki User
∙ 12y ago
Wiki User
∙ 16y agoNope, Pure Lead is much denser than Pure Gold.
Wiki User
∙ 10y agoImportant is the chemical composition, not the density.
Wiki User
∙ 14y agoNo.
Its volume (and density) will vary according to pressure and temperature.
Wiki User
∙ 13y agoNo. The densities of most substances are unique.
Wiki User
∙ 12y agonot all pure substances have the same density
Wiki User
∙ 10y agoand the rsult quere is
Wiki User
∙ 16y agoyep
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Is The density of a substance is the same for all samples of the substance?
Not necessarily. The temperature of the samples would have to be the same. It can also vary with how pure the substance is.
What are substances in which the composition is the same throughout?
If it is a pure substance, then it is a molecule or formula unit. If it is a mixture, it is a solution.
Does the composition of a substance always stay the same?
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
Are the elements on the periodic table a pure substance?
No, as made obvious by the question itself - an element cannot "contain 2 or mroe elements"; that would defy the point of it being a single and unique element. A pure substance containing two or more elements would have to be a pure compound, and good examples are water, hydrochloric acid, ammonia and carbon dioxide.
A pure substance is the what throughout?
A pure substance is the same throughout. When a substance is 100% something it is pure.
The density of a substance is the same for all samples of the substances?
Density is simply the mass divided by volume. This means that it is the amount of the substance in a specific unit of space. Because a pure substance indicates that it is exactly that, a substance made of a specific combination of elements, it will always have the same density because those elements can only take one form in order for it to be pure.
Would it be possible for two pure substances to have exactly the same set of properties?
Not if they are solid substances (ie one is not hollow in the middle). That was how Archamedies worked out how to prove the gold crown was pure gold. The density of every substance (mass per unit volume) is unique. * * * * * Not so sure about the density of EVERY substance being different. Every PURE substance: probably yeas. But every substance? For example, the density of steel can be varied from 7.75 gcm-3 to 8.05 gcm-3, by varying the proportion of the other materials in the alloy. Presumably there are some other substances with a density in that range.
What is the definition of pure substances?
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
Is The density of a substance is the same for all samples of the substance?
Not necessarily. The temperature of the samples would have to be the same. It can also vary with how pure the substance is.
Will diffrent volumes of the same substance have the same density or different densities?
Yes. Density only depends on the substance, not the size of the sample. A pure drop of the substance has the same density as a pure truckload of the same stuff.
Can you convert a mixture to a pure substance?
Only if it is a compound, as a compound is a pure substance that can be broken down into simpler pure substances by chemicalmeans. The decomposition of a substance is a chemical process that breaks down a compound into simpler substances or its constituent elements. So, by definition, the answer is yes. However, if the pure substance was an element, the answer would be no. An element is a pure substance that cannot be broken down into any simpler substances by chemical means. It is a pure substance in which every atom present has the same atomic number.
What cube has a greater density 35 centimeters or 70 centimeters?
If they both have the same substance inside, then they both have the same density. If they don't both have the same substance inside, then we have to know what the substances are before we can figure out anything about the density of the cubes. Size has nothing to do with density.
What happens when a pure substances undergoes a chemical change?
when a pure substance undergoes a chemical change it is no longer that same substance. A chemical change changes the identity of the substance. Hope i helped
What are substances in which the composition is the same throughout?
If it is a pure substance, then it is a molecule or formula unit. If it is a mixture, it is a solution.
What makes something a pure substance?
The fact that it can no longer be broken down. An element is pure because of how it cannot be broken further down.
What physical and chemical properties would you expect to find in two different samples of a pure substance?
Physically I would expect to find the same boiling and melting points, and the same density. Chemically, I would expect the same reactivity with other substances.
How can the property of density be useful as qualitative information about a specific substance?
Density information for a substance is useful because it is always the same regardless of the amount of substance there is. Take water for example. The density of water is same regardless if you have ten gallons of it or tablespoon of it. (1 gram/milliliter at STP). Since the density of a substance is always the same this property can exploited to determine the identity of unknown substances.
