CHEM 103 MODULE 4 EXAM ANSWERS PORTAGE LEARNING 2024 (
A+ GRADED 100% VERIFIED)
Avogadro's number - (answer)6.022 x 10^23 atoms = 1 mole
1 u = ___ g - (answer)1.661 x 10 ^-24 g
formula mass - (answer)the sum of the average atomic masses of each atom
represented in the chemical formula and is expressed in atomic mass units.
--The formula mass of a covalent compound is also called the molecular mass.
The chemical identity of a substance is defined by - (answer)the types and relative
numbers of atoms composing its fundamental entities (molecules in the case of covalent
compounds, ions in the case of ionic compounds).
A compound's percent composition provides - (answer)the mass percentage of each
element in the compound.
calculate the formula mass of a substance by - (answer)summing the average atomic
masses of all the atoms represented in the substance's formula.
A mole is defined as - (answer)the amount of substance containing the same number of
discrete entities (such as atoms, molecules, and ions) as the number of atoms in a
sample of pure 12-C weighing exactly 12 g
percent composition - (answer)the percentage by mass of each element in a compound
i.e. mass X / mass compound x 100%
stoichiometry - (answer)refers to the quantitative relationships between amounts of
reactants and products in a chemical reaction.
Combustion - (answer)a reaction in which an element or compound burns in air or
oxygen
--The combustion of compounds containing hydrogen and carbon (CxHy) will always
produce two products: water (H2O) and carbon dioxide (CO2).
--The same is true for the combustion of compounds containing hydrogen, carbon and
oxygen (CxHyOz)
Chemical formulas provide the - (answer)identities of the reactants and products
involved in the chemical change, allowing classification of the reaction
Coefficients provide the - (answer)relative numbers of these chemical species, allowing
a quantitative assessment of the relationships between the amounts of substances
consumed and produced by the reaction.
stoichiometric factor - (answer)ratio of coefficients in a balanced chemical equation,
used in computations relating amounts of reactants and products
A+ GRADED 100% VERIFIED)
Avogadro's number - (answer)6.022 x 10^23 atoms = 1 mole
1 u = ___ g - (answer)1.661 x 10 ^-24 g
formula mass - (answer)the sum of the average atomic masses of each atom
represented in the chemical formula and is expressed in atomic mass units.
--The formula mass of a covalent compound is also called the molecular mass.
The chemical identity of a substance is defined by - (answer)the types and relative
numbers of atoms composing its fundamental entities (molecules in the case of covalent
compounds, ions in the case of ionic compounds).
A compound's percent composition provides - (answer)the mass percentage of each
element in the compound.
calculate the formula mass of a substance by - (answer)summing the average atomic
masses of all the atoms represented in the substance's formula.
A mole is defined as - (answer)the amount of substance containing the same number of
discrete entities (such as atoms, molecules, and ions) as the number of atoms in a
sample of pure 12-C weighing exactly 12 g
percent composition - (answer)the percentage by mass of each element in a compound
i.e. mass X / mass compound x 100%
stoichiometry - (answer)refers to the quantitative relationships between amounts of
reactants and products in a chemical reaction.
Combustion - (answer)a reaction in which an element or compound burns in air or
oxygen
--The combustion of compounds containing hydrogen and carbon (CxHy) will always
produce two products: water (H2O) and carbon dioxide (CO2).
--The same is true for the combustion of compounds containing hydrogen, carbon and
oxygen (CxHyOz)
Chemical formulas provide the - (answer)identities of the reactants and products
involved in the chemical change, allowing classification of the reaction
Coefficients provide the - (answer)relative numbers of these chemical species, allowing
a quantitative assessment of the relationships between the amounts of substances
consumed and produced by the reaction.
stoichiometric factor - (answer)ratio of coefficients in a balanced chemical equation,
used in computations relating amounts of reactants and products
