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The empirical formula shows the exact number of atoms of each element in a compound.
False
If a compound contains 70% Oxygen and 30% Carbon by mass, the empirical formula would be CO2.
True
In stoichiometric calculations, a balanced chemical equation provides information about the combining ratios in moles of reactants and products.
True
The calculated number of moles in a stoichiometric calculation is converted directly to grams for the final answer.
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If 3 moles of substance A react with 2 moles of substance B according to a balanced chemical equation, then 2 moles of A will produce 3 moles of B.
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An empirical formula represents the actual molecular structure of a compound.
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Colloidal particles can be retained by ordinary filters.
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Brownian motion helps colloidal particles settle out of solution under the influence of gravity.
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Coagulation is the process in which a liquid starts to thicken and become solid.
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Agglomeration refers to a large group of identical particles brought together.
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Colloidal suspensions are stable and do not coagulate spontaneously because the particles repel each other due to their charges.
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Gravimetric calculations aim to find the volume of an analyte from the weight of precipitate.
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The molar mass of CaO is 56.077 g/mol.
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Iron (III) was precipitated as the anhydrous oxide (Fe2O3) by the addition of NH3.
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The formula weight of Fe2O3 is 159.69 amu.
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The molecular formula specifies the simplest whole number ratio of atoms in a chemical compound.
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The atomic weight scale establishes the numerical value for mass based on the carbon atom.
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Formula weight is determined by adding the atomic weight of each atom in the molecule or formula unit.
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The mole is a quantity that contains 6.02x10^23 items, known as Avogadro's number.
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27 grams of Hydrogen gas is equivalent to 13.4 moles of H2.
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0.0022 grams of CO2 contains fewer Carbon atoms than Oxygen atoms.
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The percent composition of Mg(NO3)2 shows that Nitrogen has the highest percentage compared to Magnesium and Oxygen.
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