chemistry chapter 8

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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


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