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Chemsitry Chapter 8

QuestionAnswer
Knowledge about what products are produced in a chemical reaction is obtained by __________? laboratory analysis
A chemical reaction has NOT occurred if the products have __________? the same chemical properties as the reactants
Which observation does NOT indicate that a chemical reaction has occurred? change in total mass of substances
The word equation solid carbon + oxygen (arrow) = carbon dioxide gas + energy, represents a chemical reaction because ________? CO2 has chemical properties that differ from those of C and O.
In the unbalanced formula equation CO + O2 (arrow)= CO2 + energy, energy ________? is released
The word equation for the formula equation shown is __________? ethanol + oxygen (arrow)= carbon dioxide + water + energy.
The state of the matter for a reactant or a product in a chemical equation is indicated by a ______? symbol after the formula
An insoluble solid produced by a chemical reaction in solution is called _______? a precipitate
How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water? O2
The products of the reaction, C2H5OH + 3O2 (arrow) = 2CO2 = 3H2O, have the same _____ as the reactants. atoms
After the correct formula for a reactant in an equation has been written,the ________. formula should not be changed
to balance a chemical equation, it may be necessary to adjust the ________. coefficients
Created by: kris10ess
 

 



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