chemistry chapter 8
In an equations, the symbol for a substance in water solution is followed by,
(aq)
Which coefficients correctly balance the formula equation CaO+H^2O -> Ca(OH)^2
1,1,1
Which coefficients correctly balance the formula equation
1,1,2
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
H^2
What is the balanced equation for he combustion of sulfur
S(s)+O^2(g)-> SO^2(g)
A chemical formula written over the arrow in a chemical equation signifies
a catalyst for the reaction
What is the small whole number that appears in front of a formula in a chemical equation
a coefficient
When a solid produced by a chemical reaction separates from the solution it is called
a precipitate
According to the law of conservation of mass, the total madd of the reacting substances is
always equal to the total mass of the products
Which observation does not indicate that a chemical reaction has occurred
change in total mass of substances
To balance a chemical equation, it may be necessary to adjust the
coefficient
In what kind of reaction does a single compound produce two or more simpler substances
decomposition reaction
The equation AX-> A+X is the general equation for a
decomposition reaction
The reaction represented by the equation 2HgO(s)-> 2Hg(l)+ O^2(g) is a
decomposition reaction
The reaction represented by the equation 2KClO^3(s)-> 2KCl(s)+ 3O^2 (g) is a
decomposition reaction
In what kind of reaction does one element replace a similar element in a compound
displacement reaction
In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds
double-displacement reaction
The equation AX+BY -> AY+BX is the general equation for
double-displacement reaction
A chemical equation is balanced when
same umber of each kind if atom appears in the reactants ad in the products
The equation A+BX -> AX + B is the general equation for a
single- displacement reaction
The reaction represented by the equation Cl^2(g)+2KBr(aq)-> 2KCl(aq) +Br^2(l) is a
single-displacement reaction
The reaction represented by the equation Mg(s)+ 2HCl(aq)-> H^2(g) +Mg CL^2(aq) is a
single-displacement reaction
The equation A+X-> AX is the general equation for an
synthesis reaction
In a chemical reaction
the mass of the reactants equals the mass of the product
