![]() Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. ![]() You can find metric conversion tables for SI units, as well as English units, currency, and other data. This site explains how to find molar mass.Ĭ provides an online conversion calculator for all types of measurement units. 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. ![]() 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.Ī common request on this site is to convert grams to moles. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. 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. 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. Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. These relative weights computed from the chemical equation are sometimes called equation weights. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.įormula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. 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.įinding molar mass starts with units of grams per mole (g/mol). Moles NaCl to grams, or enter other units to convert below: Enter two units to convert From: It's atomic mass is 58.44g.You can do the reverse unit conversion from Sodium chloride has the formula NaCl so one mole of sodium chloride has 1 mole of sodium atoms and 1 mole of chlorine atoms. Water has the formula H 2O, so one mole of water has 2 moles of hydrogen atoms and 1 mole of oxygen atoms. Oxygen has the formula O 2, so one mole of oxygen has 2 moles of oxygen atoms. See examples below:Ĭopper has the formula Cu so one mole of copper has 1 mole of copper atoms. However, to calculate the molar mass of any other type of substance we use the formula to determine how many moles of atoms are contained in one mole of the substance.This is more commonly referred to as the molar mass. For example, the mass of one mole of sodium is 22.99 g. The mass of one mole is equivalent to the atomic mass in grams. When doing calculations we need to relate the mass of a substance to the mass of one mole of that substance. Notice in the above examples that the formula of a substance defines the basic submit of that substance.(The molecular modles above were used with permission and created by C.H.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |