Now we interpret the coefficients as referring to molar amounts, not individual molecules. Transfer the prepared solution to a clean, dry storage. Molar Mass The molar mass of any substance is the mass in grams of one mole of representative particles of that substance. NEVER hold large volumetric flasks by the neck alone - provide support at the bottom. 249. Mix your solution thoroughly, by inverting the flask and shaking. Molecular weight calculation: 12.0107 + 238.02891 + 32.065 + 15.99944 Percent composition by element Element: Carbon Symbol: C Atomic Mass: 12.0107 of Atoms: 1 Mass Percent: 3.470 Element: Oxygen Symbol: O Atomic Mass: 15.9994 of Atoms: 4 Mass Percent: 18.491 Element: Sulfur Symbol: S Atomic Mass: 32.065 of Atoms: 1 Mass Percent: 9. ![]() We can leave out the word mol and not write the 1 coefficient (as is our habit), so the final form of the equation, still balanced, is Very carefully fill the flask to the mark on the neck of the flask, using a dropping pipette to add the last few milliliters of liquid. See also our theoretical yield calculator for chemical reactions (probably your next stop to finish the problem set). Interactive periodic table with up-to-date element property data collected from authoritative sources. But 6.022 × 10 23 is 1 mol, while 12.044 × 10 23 is 2 mol (and the number is written that way to make this more obvious), so we can simplify this version of the equation by writing it as The molar mass of CuSO4 (Copper sulfate) is: 159.602 grams/mol. These coefficients also have the ratio 2:1:2 (check it and see), so this equation is balanced.
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