Questions and Answers
THE PERCENT BY MASS OF AN ELEMENT IN A COMPOUND IS OBTAINED BY USING THE EQUATION:
$ ext{Percent composition} = rac{ ext{mass of element}}{ ext{molar mass of compound}} imes 100$
The ______ of a compound shows the types of elements present in it and the simplest whole number ratio of the different types of atoms in it. Using the mole, an ______ is the lowest whole-number ratio of moles of atoms of the elements in the compounds.
empirical formula
The ______ of a compound shows the actual number of atoms of different elements in one molecule of the compound.
molecular formula
About 200 years ago, it was believed that only living things could produce carbon compounds. However in 1929, a German chemist named Friedrich Wohler produced an organic compound called urea from to inorganic substances.
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The empirical formula of a compound can be determined from the ______ of a compound. It can also be obtained by conducting an experiment. First, find out the mass of the reactants taking part in the reaction. Next, work out the relative number of moles of the reactants used. Then, you are able to find the formula of the compound.
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