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6.5ef Chemical

Formulas, Reactions and equations

QuestionAnswer
True or False: Equations can be used to model chemical changes. True
Matter is conserved because atoms are conserved in _____ processes. Chemical and physical
What is the product in the chemical equation below? C + O2 → CO2 CO2
Which part of the equation shows what you will have after the reaction has occurred? products
Chemical equations illustrate how atoms of elements _____ in a chemical reaction. rearrange
How many elements are present in the chemical equation for iron oxide (product)? 4Fe + 3O2 + 6H2O → 4Fe(OH)3 3 (Fe, O, H)
Which part of the chemical equation shows what you start with before the reaction has occurred? reactants
True or False: You can gain atoms through a chemical reaction. False (you can't gain or lose atoms)
True or False: Chemical equations tell us how long a chemical reaction will take. False
Chemical equations are used to illustrate how elements become rearranged in a chemical _____. reaction
True or False: A balanced chemical equation has the same number of atoms of each element on each side of the equation. True
How many atoms are in one molecule of carbon dioxide? CO2 3
When a chemical reaction occurs you get a ___________________. Brand new substance
During a chemical reaction you often see indicators such as a color change, _______________ produced or a precipitate forms. gases
Created by: wolfgacn
 

 



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