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What is the answer to elements and compounds?
Elements are substances that cannot be broken down into simpler substances by chemical means and are listed on the periodic table. Compounds are substances made up of two or more elements chemically bonded together in fixed 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).
What are composed of 2 or more elements that have been chemically combined?
Compounds are composed of two or more elements that are chemically combined in definite proportions. The elements in a compound are held together by chemical bonds, which result in a unique set of properties different from the elements that make up the compound.
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.
Does adding coefficients to a chemical equation disobey the law of definite proportion?
No, adding coefficients to a chemical equation does not disobey the law of definite proportion. The coefficients simply represent the relative number of moles of each substance involved in the reaction and do not alter the proportion of elements present in the compounds.
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.
One difference between a compound and a mixture is a compound always?
A compound always has a fixed chemical composition where the elements are bonded together in specific ratios, forming a new substance with unique properties. In contrast, a mixture is a physical combination of two or more substances that can be separated by physical means, and the components retain their original properties.
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.
What is the answer to elements and compounds?
Elements are substances that cannot be broken down into simpler substances by chemical means and are listed on the periodic table. Compounds are substances made up of two or more elements chemically bonded together in fixed 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 a compound .science. and what things could be compounds?
A compound is a pure substance, composed of two or more elements chemically combined, and having a definite proportion. Water, H2O, is a compound of hydrogen and oxygen; carbon dioxide, CO2, is a compound of carbon and oxygen; and glucose, C6H12O6, is a compound of carbon, hydrogen, and oxygen.
