The molecular formula C4H4 (molar mass: 52.07 g/mol) may refer to:
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than chemical names and structural formulae.
In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2. Thus, sulfur monoxide and disulfur dioxide, both compounds of sulphur and oxygen, have the same empirical formula. However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.
In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles. It is the mass of 1 mole of the substance or 6.022×1023 particles, expressed in grams. The molar mass is a bulk, not molecular, property of a substance. The molar mass is an average of many instances of the compound, which often vary in mass due to the presence of isotopes. Most commonly, the molar mass is computed from the standard atomic weights and is thus a terrestrial average and a function of the relative abundance of the isotopes of the constituent atoms on Earth. The molar mass is appropriate for converting between the mass of a substance and the amount of a substance for bulk quantities.
Benzol may refer to:
In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a chemical formula. The informal use of the term formula in science refers to the general construct of a relationship between given quantities.
The molecular formula C17H21NO4 may refer to:
Casomorphin is an opioid peptide derived from the digestion of the milk protein casein.
The molecular formula BaSO4 (molar mass: 233.39 g/mol, exact mass: 233.8570 u) may refer to:
The molecular formula C4H6O2 may refer to:
The molecular formula C4H10O may refer to:
The molecular formula C4H4O4 (molar mass: 116.07 g/mol) may refer to:
To see a more detailed description of these isomers, see Amyl alcohol.
Dihydroxybenzoic acids (DHBA) are a type of phenolic acids.
Dioxin may refer to:
Dihydroxycinnamic acid may refer to several molecules with the molecular formula C9H8O4 including:
Octynes are alkynes with one triple bond and the molecular formula C8H14.
Nonynes are alkynes with one triple bond and the molecular formula C9H16.
Decynes are alkynes with one triple bond and the molecular formula C10H18.
Heptynes are alkynes with one triple bond and the molecular formula C7H12.