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What is Substances composed of 2 or more elements chemically united in a definite proportion by mass?
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Pure substance vs mixture?
A pure substance is something like just water (H2O). A homogeneous mixture is a solution with multiple compounds. These mostly contain water, but not always. An example of a homogeneous mixture is H2O+NaCl or NaCl (aq).
What is the answer to elements and compounds?
Elements and compounds are pure substances. Elements are composed of only one kind of atom, and compounds are composed of two or more elements chemically bonded in a definite composition.
What is a compound in chemistry?
A compound is a pure substance consisting of two or more chemically combined elementsDo you mean compound if so a compound is 2 elements chemically bonded together
Is dinitrogen monoxide a pure substance?
No, dinitrogen monoxide, or nitrous oxide, is a compound with the molecular formula N2O. Compounds are pure substances, and each compound has its own unique formula of elements that are chemically bonded, which means that it has a definite composition. Mixtures have no definite composition, and are not chemically bonded.
What is a mixture of two or more substances?
A combination of two substances that do not chemically react can be a mixture or a solution.When two substances combine to form a new substance, it is said that a chemical reaction has occurred. This reaction is a combination reaction, also known as synthesis. The new substance formed may or may not possess the properties of the constituent substances.When the separate substances are elements, a chemical reaction is one that creates chemical bonds, the combined substance being a compound.
One difference between a compound and a mixture is a compound always?
A compound is composed of two or more elements chemically combined in a definite proportion. The components of a mixture are not chemically combined and can vary in proportion.
Why is water not a compound?
Water most definitely IS a compound! It is a compound composed of hydrogen and oxygen atoms chemically bonded in a definite proportion of 2H:1O. The molecular formula is H2O. A compound is a pure substance composed of different elements chemically bonded in definite proportions.
How mixtures different from substances?
The components of a mixture are not chemically combined and do not have a definite composition. A pure substance is either an element or a compound (in which case it is composed of elements that are chemically combined) and has a definite composition.
How are compounds diffident from mixtures?
Compounds are composed of atoms of different elements chemically bonded in definite proportions. The components of mixtures are not chemically combined and they do not have definite proportions.
What are the characteristics of a subtances and mixtures?
The components of a mixture are not chemically combined and do not have a definite composition. A pure substance is either an element or a compound (in which case it is composed of elements that are chemically combined) and has a definite composition.
How are mixtures differ from substance?
Substances cannot be separated without breaking chemical bonds, whereas mixtures are composed of substances not chemically bonded together.Naturally occurring sulfur crystalsSulfur occurs naturally as elemental sulfur, sulfide, and sulfate minerals and in hydrogen sulfide. This mineral deposit is composed of a mixture of substances.Key PointsA substance is composed of one type of atom or molecule.A mixture is composed of many different types of atoms or molecules.A mixture may contain several substances.Niharika Agarwal Haldiram
What are two characteristics that distinguish compounds from mixture?
Compounds are pure substances composed of atoms bonded together chemically in definite proportions. Mixtures are not pure substances and the components of a mixture are not chemically bonded and can be present in many different proportions.
Pure substance vs mixture?
A pure substance is something like just water (H2O). A homogeneous mixture is a solution with multiple compounds. These mostly contain water, but not always. An example of a homogeneous mixture is H2O+NaCl or NaCl (aq).
Which type of substance is composed of two or more different kinds of elements always in the same ratio?
Two or more different elements that are chemically combined in a definite ratio is a compound. Based on the nature of the bonds, it can be called an ionic compound (i.e. atoms bonded together by ionic bonds) or an molecular compound (i.e. atoms bonded together by covalent bonds).
What is the difference between a mixture and a mixture homeogene heterogeneous?
A mixture is composed of substances that are not chemically combined, and which do not have a definite composition. A homogeneous mixture is uniform throughout. A solution is a homogeneous mixture. A heterogeneous mixture is not uniform throughout. Examples of a heterogeneous mixture are granite or beef stew.
What is the answer to elements and compounds?
Elements and compounds are pure substances. Elements are composed of only one kind of atom, and compounds are composed of two or more elements chemically bonded in a definite composition.
What are the differences between pure substances and mixture?
Mixtures can be separated by physical means, whereas pure substances cannot. Also, mixtures are composed of multiple substances, while pure substances are, as the name implies, composed of only one substance.
