Unit 4 Flashcards
What can be predicted by using an activity series
whether a certain chemical reaction will occur
After the first steps in writing an equation, the equation is balanced by
adjusting coefficients to the smallest whole-number ratio
which observation does NOT indicate that a chemical reaction has occurred
change in total mass of substances
a chemical equation is balanced when the
same number of each kind of atom appears in the reaction and in the products
the atomic mass of hydrogen is 1.008 amu. The reason that this value is not a whole number is that
hydrogen has more than one isotope
a chemical reaction has NOT occurred if the products have
the same chemical properties as the reactants
What can be said about 1 mol Ag and 1 mol Au
they contain the same number of atoms
to balance a chemical equation, it may be necessary to adjust the
coefficients
To find the molecular formula from the empirical formula, one must determine the compound’s
formula mass
An element in the activity series can replace any element
below it on the list
the state of matter for a reactant or a product in a chemical equation is indicated by a
symbol after the formula
A chemical formula includes the symbols of the elements in the compound and subscripts that indicate
the number of atoms or ions of each type
The products of the reaction, C2H5OH + 3O2 -> 2CO2 + 3H2O have the same _____ as the reactants
atoms
To determine the molar mass of an element, one must know the element’s
average atomic mass
An insoluble solid produced by a chemical reaction in solution is called
a precipitate
