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Chemistry

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Joesph Kling

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Cards in this guide (11)
Which of the following is an example of a synthesis reaction

H2+Br2-->2HBr

What does percent composition tell you about a molecule

It tells you how much of a molecule is made up of each element. - APEX

Why are state symbols used in chemical equations

They identify what phase the substances are in

-Apex

What are the substances you end up with in a chemical reaction called

The products

What reaction shows a compound breaking apart into separate substances

Decomposition reaction

What is the best definition of a physical change

Answer this question… Which of the following is the best definition of a physical change?

Which the following is a necessary product of a combustion reaction

heat

What happens in a double replacement reaction

In this reaction a change of bonds of the reactants occur: the general form is:
AB + CD = AD + BC

What is a following is a decomposition reaction

CaCO3 -> CaO + CO2

Which of following is an example of a decomposition reaction

2NaCl - 2Na + Cl2. apex

Which o fthe following represents a physical change

Phase change - apex

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