chemistry honors 3rd 9 weeks exam review
which coefficients correctly balance the formula NH4NO2->N2+2H2O?
1 1 2
which coefficients correctly balance the formula equation NH4NO2->N2+H2O?
1 1 2
what is the balanced equation when aluminum reacts with copper(ll) sulfate?
2Al+3CuSO4->Al2(SO4)3+3Cu
which equation is not balanced?
2H2+o2->H2o
when the equation FE3O4 +Al->Al2O3 +Fe is correctly balanced what is the coefficient of Fe?
9
Which of the following is a formula equation for the formation of carbon dioxide from carbon and oxygen
C+O2->CO2
in the word equation sodium oxide+ water -> sodium hydroxide the formula for sodium hydroxide is represented by
NaOH
a chemical formula written over the arrow in a chemical equation signifies
a catalyst for the reaction
what is the measured amount of a product obtained from a chemical reaction?
actual yield
in the equation 2Al+3Fe(NO3)2->3Fe+2Al(NO3)3 iron has been replaced by
aluminum
according to the law of the conservation of mass the total mass of the reacting substances is
always equal to the total mass of the products
in the equation, the symbol in a substance in water solution is followed by...
aq
Predict what happens when calcium metal is added to a solution of magnesium chloride
calcium chloride
magnesium bromide+chlorine yields
calcium chloride
the reaction of calcium oxide, CaO, with water yields
calcium hydroxide
which observation does not indicate that a chemical reaction has occurred?
change in total mass of substances
the equation AX->A+X is the general equation for
decomposition reaction
in what kind of reaction does one element replace a similar element in a compound
displacement reaction
the equation AX+BY->AY+BX is the general equation for
double displacement
the reaction represented by the equation Pb(NO3)2+2KI->PbI2+2KNO3 is
double displacement reaction
In writing a chemical equation that produces hydrogen gas the correct representation of hydrogen gas is
h2
which reactant controls the amount of the product formed in a chemical reaction
limiting reaction
a balanced chemical equation allows one to determine the
mole ratio of any two substances in the reaction
what is the ratio of the actual yield to the theoretical yield multiplied by 100%
percentage yield
when a solid produced by a chemical reaction separates to form the solution
precipitate
the coefficients in a chemical equation represent the
relative number of moles of reactants and products
a chemical equation is balanced when the
same number of each kind of atom
a chemical equation is balanced when...
same number of each kind of atom appears in the reactants and in the product
the reaction represented by the equation Mg+2HCl-> H2 + MgCl2 is
single displacement reaction
In what kind of reaction do 2 or more substances combine to form a new compound?
synthesis reaction
the reaction represented by the equation 2Mg+O2 ->2MgO
synthesis reaction
if the percent yield is equal to 100% then
the actual yield is equal to the theoretical yield
what is the maximum possible amount of product obtained in chemical reaction
theoretical yield
in a double displacement reaction hydrogen chloride and sodium hydroxide react to produce sodium chloride another product is
water
