For covalent substances, the formula represents the numbers and types of atoms composing a single molecule of the substance; therefore, the formula mass may be correctly referred to as a molecular mass. Consider chloroform (CHCl3), a covalent compound once used as a surgical anesthetic and now p...
Formula Mass the mass of an individual molecule or formula unit also known as molecular mass or molecular weight (MW) sum of the masses of the atoms in a single molecule or formula unit whole = sum of the parts! mass of 1 molecule of H 2 O = 2(1.01 amu H) + 16.00 amu O = 18....
For example, one molecule of nitric acid (HNO3) contains one nitrogen atom weighing 14.01 amu, one hydrogen atom weighing 1.008 amu, and three oxygen atoms weighing (3 × 16.00 amu) = 48.00 amu. The formula mass of nitric acid is therefore (14.01 amu + 1.008 amu + 48.00 amu) = 63.02...
是指一个 formula unit 的 particle 的 relative mass。本来是该用于没有 molecule 的 particle 的 relative mass。例如 NaCl 含 ions 而不含 molecules，所以没有 r.m.m.，但 NaCl 含一个 Na+ ion 和一个 Cl- ion，所以 f.m. of NaCl = 23 + 35.5 = 58.5。但 f.m. 可应用于任何...
No matter how large or small the molecule, the procedure for calculating its molecular mass is the same. You look up the atomic mass of each of the elements in the formula, multiply it by the number of atoms of that element in the compound and add it to all the others. This gives yo...
Related to Molecular mass:molecular formula,relative molecular mass molecular weight n. The sum of the atomic weights of all the atoms in a molecule. Also calledrelative molecular mass. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin ...
of all atoms within the molecule to calculate the molar mass. find the atomic mass for each element using the mass shown in the periodic table or atomic weight table. multiply the subscript (number of atoms) times that element’s atomic mass and add the masses of all the elements in the...
The meaning of MOLECULAR MASS is the mass of a molecule that is equal to the sum of the masses of all the atoms contained in the molecule.
Fomula mass and molecular mass are two values that express the size of a molecule. Do you know the difference between formula mass and molecular mass? Theformula mass(formula weight) of a molecule is the sum of the atomic weights of the atoms in its empirical formula. ...
Theformula massof a molecule (also known asformula weight)is the sum of theatomic weightsof theatoms in the empirical formulaof the compound. Formula weight is givenin atomic mass units(amu). Example and Calculation Themolecular formulafor glucose is C6H12O6, so theempirical formulais CH2O. The...