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Is it true that the chemical formulas of molecular compounds show the number and type of atoms in each molecule?
Wiki User
∙ 14y ago
A chemical formula does show the number and types of atoms present in a molecule, which is formed by covalent bonding, and it also shows the ratio of ions in a formula unit of an ionic compound.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoChemical formulas such as Al2(SO3)3 can be divided into empirical formula, molecular formula, and structural formula. Therefore, to determine the number of atoms of, say, oxygen in the above formula, you would multiply the subscript behind the O by the subscript to the right of the end parenthesis bracketing the polyatomic ion containing the oxygen - in this case the answer would be 9 oxygen molecules. If there is no subscript to the right of the elemental symbol for the atom in question, there is one atom (such as for the sulfur in the formula above - only one sulfur in the polyatomic ion, multiplied by 3 of the ions for a total of 3 sulfur atoms). If there are no parentheses bracketing a polyatomic ion, just read the subscript to the right of the elemental symboly - above, there are 2 aluminum atoms in this molecule.
Wiki User
∙ 14y agoyes
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How are the empirical and molecular formulas for a compuond related?
An empirical formula is a brutto formula; a molecular formula explain the structure of a molecule.
What is the different between compound and a molecule?
Compounds are formed by chemical changes using 2 or more elements. There are 2 kinds of elements. Molecular compounds are made up of molecules. One molecule is the smallest particle of these compounds. Water is one of these type compounds and the smallest particle is a water molecule which has exactly 2 hydrogen atoms and 1 oxygen atom. There is another kind of compound called an ionic compound. These do not contain individual molecules, but the oppositely charged ions attract each other in large numbers and form ionic crystals. Table salt, NaCl, is one of these ionic compounds and exists as a large number of positive sodium ions attracted to a large number of negative chloride ions.
A chemical formula used to show the number and types of atoms present in a molecule is referred to as what?
A chemical formula that shows the number and types of atoms in a molecule is known as a molecular formula. Molecular formulas are written by writing the symbol for each element followed by a subscript to show the actual number of atoms in the molecule.
What is the molecular weight of Bacillus Megaterium?
The mentioned name is the name of an organism, not a molecule or compound. It therefore has no specific molecular weight since it is not a chemical
What summarises all the atoms in a molecule?
The atoms in a molecule are summarised by the molecular formula. The molecular formula is the identity and numbers of its constituent atoms.
What is true about molecular compounds?
Two or more elements are chemically bonded.
What is the name for a molecule that has a different arrangement of atoms?
When the same elements form compounds with different molecular forms, the compounds are known as isomers. (They may have different chemical properties.)
Why ionic compounds do not posses molecular formula?
it is not a molecule
Describe the differences between molecular formulas and structural formulas for molecular compounds?
A molecular formula lists the numbers of the atoms of a specific element in a compound. A structural formula is a picture of how the atoms in a specific molecule are connected, with each atom represented by its chemical symbol. For example, oxygen's molecular formula is O2. Its structural formula is O-O.
What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?
Molecules that have identical molecular formulas but the atoms in each molecule are arranged differently are called isomers.
What is salts molecular?
For ionic compounds the correct term is formula unit, not molecule.
Water dissolves many ionic and molecular compounds why?
because it is a polar molecule
Discuss how water can dissolve a molecular compond?
Water dissolves some molecular compounds because water is a polar molecule.
What is the chemical symbol for ammonia molecule?
The molecular formula (not the chemical symbol) for ammonia is NH3.
How is a molecule different than a compound?
A molecule is two or more atoms held together by covalent chemical bonds. A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms that are held together in a defined spatial arrangement by chemical bonds. Chemical compounds can be molecular compounds held together by covalent bonds, salts held together by ionic bonds, intermetallic compounds held together by metallic bonds, or complexes held together by coordinate covalent bonds
What are the symbols used for compounds called?
They are called "formulas" (Latin formulae) and show what elements and ions are in the compound. The formula H2O for water shows that a water molecule is made of two atoms of hydrogen and one of oxygen.The symbols representing chemical compounds are called chemical formulas. They can be expressed as an empirical formulawhich shows the simplest ratio of atoms in the compound, or a molecular formula which shows the actual number of each atom in the compound, or as a structural formula which shows the spatial relationship of the atoms.
Why some compound do not have molecular formula?
Once you get into the realm of compounds you are really looking at two types---ionic and molecular. Molecular compounds are made up of all the same type of molecule, and those molecules consist of a series of atoms covalently bonded together. The molecular formula of a molecular compound gives the number of each type of atom that makes up the molecule. Ionic compounds are different---there are no definable molecules present, just lattices of alternating positive and negative ions (charged atoms). So unlike molecular compounds there is no definable subunit in an ionic compound. Instead ionic compounds are represented by the simplest ratio of ions in the compound. For instance, in table salt there is one sodium ion per chlorine ion so the formula is NaCl. that does not mean there are little NaCl molecules making up the compound, just that the ratio of those two ions is 1:1. In calcium chloride there are two chloride ions for every calcium ion, so its formula is CaCl2. So the simple answe to the question is that molecular formulas are not used for ionic compounds because they are not comprised of molecules. That does not keep people (even chemists) from referring to the formulas of ionic compounds as "molecular formulas" but it is technically a misnomer. Simply calling them "formulas" or "ionic formulas" would be more appropriate.
