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☆☆☆☆☆Cards in this guide (16)
What happens in a synthesis reaction
two substances combine to form a new substance
Which of the following is an example of a synthesis reaction
H2+Br2-->2HBr
What is the equation of methane with bromine in the presence of sunlight
CH4(g) + Br2(g) -----------------> CH3Br(g) + HBr(g)
(sunlight/UV Light)
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 molecular formula of the compound CH2 with molar mass 168
C12h24
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 concentration unit is independent of temp
The unit of concentration is Molar = Moles/Litre.
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
Best describes where cellular respiration occurs
In every body cell -apex
Which o fthe following represents a physical change
Phase change - apex
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