Molar mass of NaCl is 58.443, how many grams is 5 mole NaCl Molar mass of AgNO3 is 169. This online calculator you can use for computing the average molecular weight (MW) of molecules by entering the chemical formulas (for example C3H4OH(COOH)3 ). The mass (in grams) of a compound is equal to its molarity (in moles) multiply its molar mass: grams mole × molar mass. Each set of units must be converted to moles first. The mass and molarity of chemical compounds can be calculated based on the molar mass of the compound. Now we interpret the coefficients as referring to molar amounts, not individual molecules. A mole road map is a simple guide for converting between units of mass, volume, and number of particles. 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 That is, 6.02 x 1023 molecules of hydrogen is one mole of hydrogen, 6.02 x 1023 molecules of nitrogen is one mole of nitrogen, 6.02 x 1023 molecules of oxygen is one mole of oxygen, etc. For these elements one mole is 6.02 x 1023 molecules. Thus, the amount of a purse substance in moles is equal to the number of atoms divided by Avogadros constant, or 6.02214076 × 1023. 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 we have learned about seven elements that exist as diatomic moleculesH2, N2, O2, F2, Cl2, Br2, and I2. These coefficients also have the ratio 2:1:2 (check it and see), so this equation is balanced.
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