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