Chemistry Ch. 8 Test
In an equation the symbol for a substance in water solution is followed by____?
a. (aq)
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is...
a. H2(g)
The equation AX->A+X is the general equation for a...
a. decomposition reaction
The equation AX+BY->AY+BX is the general equation for a....
a. double-displacement reaction
Element A in the activity series can replace any element B if.....
a. element A is above element B
The reaction represented by the equation Mg(s)+2HCl(aq)->H2(g)+MgCl2(aq) is a .....
a. single displacement reaction
In a chemical reaction...
a. the mass of the reactants equals the mass of the products
To balance a chemical equation, it may be necessary to adjust the______.
b. Coefficients
A solid produced during a chemical reaction , which separates from the solution is called...
b. a precipitate
In what kind of reaction does a single compound produce two or more simpler substances?
b. decomposition reaction
The reaction represented by the equation Cl2(g)+2KBr(aq)->2k=KCl(aq)+Br2(l) is a(n)....
b. single-displacement reaction
What can be predicted by using an activity series?
b. whether a certain chemical reaction will occur
The reaction represented by the equation 2KClO3(s)->2KCl(s)+3O2(g) is a(n)....
b.decomposition reaction
In what kind of reaction do two or more substances combine to form a new compound?
b.double-displacement reaction
Which coefficients correctly balance the formula equation... NH4NO2(s)--->N2(g)+H2o(l)?
c. 1,1,2
When the equation Fe3O4+ Al-> Al2O3+___Fe is correctly balanced, what is the coefficient of Fe?
c. 9
The reaction represented by the equation 2HgO(s)->2Hg(l)+O2(g) is a(n)...
c. decomposition reaction
The equation A+X->AX is the general for a(n)..
c. synthesis reaction
The reaction represented by the equation 2Mg(s)+O2(g)-> 2MgO(s) is a ....
c. synthesis reaction
Based on the activity series, predict whether the reaction NaBr+Cl2-> will occur
d. not enough information (not sure)
A chemical reaction is balanced when the.....
d. same number of each kind of atom appears in the reactants and in the products
The equation A+BX-> AX+B is the general equation for a...
d. single-displacement reaction
Based on the activity series predict whether the reaction Ca+MgCl2-> will occur.
n/a
Based on the activity series predict whether the reaction CaF2 + Cl2 -> will occur.
n/a
Based on the activity series predict whether the reaction Ni+ 2KCl -> will occur.
not sure
