Chemistry Vocab Test 2

What occurs when elements or compounds combine or separate to form different elements or compounds; the elements and compounds have "reacted"

chemical change

In matter only involves a rearrangement of the particles of matter; no new element or compound is formed; no "reaction" has taken place is called

physical change

List 5 indicators of chemical change which may be observed in a chemical reaction

color change
room temperature gas produced or used up spontaneously
heat produced or absorbed spontaneously
light or electrical energy produced spontaneously
formation of a precipitate
formation of smoke
reactions are usually more difficult to reverse than physical changes

What is formation of a precipitate?

solid spontaneously formed in a liquid mixture

In a balanced equation, the same are represented on both sides, as __ and as __.

reactants and products

The same number of each kind of element is balanced by __ and __.

subscripts and coefficients

To balance a chemical equaiton, what are added in front of compounds that have too few of a particular element?

coefficients

Chemical equations contain specific __ and __ as reactants and products.

elements and compounds

What cannot be changed, added, or removed to balance a chemical equation?

subscripts

What does balanced equations follow?

the Law of Conservation of Matter

In chemical reactions, elements of what are not created or destroyed.

matter

All reacting elements are conserved as __.

products

What is intercept a balanced chemical equation in order to convert given information (mass) about one compound and asked to calculate information about a different compound.

stoichiometry