Co element formula how to#

The (aq) sign stands for aqueous in water and means the compound is dissolved in water. The (l) sign means the substance is a liquid. The (s) sign means that the compound is a solid. Often chemical equations are written showing the state that each substance is in. Since they undergo a chemical process, they are changed fundamentally. The equation shows that the reactants (AgNO 3 and NaCl) react through some process (->) to form the products (AgCl and NaNO 3). In this equation, AgNO 3 is mixed with NaCl.

For example:ĪgNO 3(aq) + NaCl(aq) -> AgCl(s) + NaNO 3(aq) You should have reviewed naming schemes, or nomenclature, in earlier readings.Ī chemical equation is an expression of a chemical process. We call chlorine 'chloride' in this case because of its connection to sodium. To represent a molecule of table salt, sodium chloride, we would use the notation 'NaCl', where 'Na' represents sodium and 'Cl' represents chlorine. For example, the symbol 'C'represents an atom of carbon, and 'H' represents an atom of hydrogen. Success in chemistry depends upon developing a strong familiarity with these basic symbols. In chemistry, we use symbols to represent the various chemicals.

Given enough information, one can use stoichiometry to calculate masses, moles, and percents within a chemical equation. Stoichiometry is simply the math behind chemistry. Chemical Nomenclature(REQUIRED FOR CREDIT!).The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance.

Co element formula how to#

This site explains how to find molar mass.įinding molar mass starts with units of grams per mole (g/mol). The reason is that the molar mass of the substance affects the conversion. To complete this calculation, you have to know what substance you are trying to convert.

These relative weights computed from the chemical equation are sometimes called equation weights.Ī common request on this site is to convert grams to moles. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.įormula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes.

This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.