Therefore, 1 molecule of O 2 will weigh = 32/ 6.022×10 23 = 5.313 × 10 −23 g 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? The molecular weight of the oxygen atom is 16 g/mol, however the oxygen molecule [math]O_2[/math] is 32 g/mol. mass of 6.023 X 10 23 molecules (one mole) of oxygen = 32g. The molecular mass can be calculated from the chemical formula and is expressed in conventional atomic mass units equal to 1/12 of the mass of a neutral carbon-12 (12 C isotope) atom. Thus, mass of 1 mole of oxygen is = 32gm When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. hope it helps you Thus, the molar mass that is the mass of 6.023 X 10 23 molecules of oxygen will be 32g. Finding molar mass starts with units of grams per mole (g/mol). (write your answer in scientific notation. Number of atoms in 1 mole of oxygen = 6.022 × 10 23 molecules . One mole equals 6 x 10^23 atoms/molecules/whatever. In a molecule of oxygen, there are two oxygen atoms and it is denoted by O 2. round the coefficient … The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. round the coefficient to the nearest hundredth) and calculate the mass of one oxygen atom if an oxygen molecule consists of 2 atoms. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). Weights of atoms and isotopes are from NIST article. Then convert from moles to grams: 1 mole elemental oxygen(16 grams O/1 mole) = 16 grams. Oxygen's atomic weight is 16.00 amu. Atomic mass of oxygen = 16gm Molar mass of oxygen = (16×2)gm =32gm Mass of 1 mole of any molecule is equal to its molar mass. 1 decade ago If the mass of one molecule of oxygen is 5.3x10 (to -23 power) grams, find the mass of 20,000 molecules-----? Click hereto get an answer to your question ️ Rearrange the following in the order of increasing mass and choose the correct order (Atomic mass, N = 14,O = 16,Cu = 63 )(I) 1 molecule of oxygen(2) 1 atom of nitrogen(3) 1 × 10^-10gm molecule of oxygen(4) 1 × 10^-10gm of copper in an experiment, a chemist collected about 32 grams of oxygen molecules in a gas syringe. Because 6.022 × 10 23 molecules of O 2 weigh 32 g . So, the molecular mass of O 2 will be 2 X 16u = 32u. So take the molecular mass of elemental oxygen - 16 grams per mole. (write your answer in scientific notation. (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. Weight of 1 mole of oxygen molecules = 32 g of oxygen . So. For example, the molecule acetylene has molecular formula C 2 H 2, but the simplest integer ratio of elements is CH. Express the answer in scientific notation. 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