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Hello students, in a question given, molarity equal to 0 .80 mola, mass is 13 .92 grams, volume 75 ml converted to liters.
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Empirical formula of the compound is given, cho.
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We need to find the molecular formula of the unknown acid.
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We know that molarity is equal to mole divided by volume in liters, which implies moles equal to molarity into volume.
00:49
We have the values, just substituting, this equals 0 .80 into 75 into 10 power minus 3, so moles equals 0 .060.
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Now, since moles equals mass divided by molar mass, this implies molar mass is equal to mass divided by number of moles, that is substituting the values here, mass is given 13 .92 divided by 0 .060, so this equals 232, so molar mass is 232.
01:43
So we have molecular formula is equal to empirical formula with subscript n, where n is molar mass divided by empirical mass...