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Will these changes result in the molar mass of a substance no longer being exactly equal to the molecular mass expressed in grams? Yes. The ratio between the molar mass and the relative molecular mass is called the molar mass constant, and it used to be 1 g/mol exactly. Now that Avogadro's constant is set to a fixed value, it's value has to be determined ...


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"The Mn in iron ore should be equal to Mn in slag." vs "the solution in my book reads MnO from ore equals Mn in hot metal plus MnO in slag." It seems that the calculation desired involves breaking down the MnO in ore to Mn + O, and putting some of the Mn into the metal; the rest of the Mn goes into slag, as MnO. The hot metal would contain only metallic Mn, ...


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