Ch.5 Chem EQ Question Preview (ID: 47209)


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Endothermic applies to all of the following, except?
a) Energy enters the system
b) More energy is seen AFTER the reaction
c) Will get 'colder'
d) Energy leaves the system.

Mg + O2---MgO what is diatomic in this equation?
a) Mg
b) O2
c) MgO
d) Nothing is

Mg + O2---MgO. Balanced equation would be:
a) Mg + O2---MgO2
b) Mg + O2---2MgO
c) 2Mg + O2---2MgO
d) 2Mg + 2O2---2MgO.

If we see an (l) in a equation, what does it mean?
a) solid
b) liquid
c) gas
d) aqueous (ions)

Four or more elements, two switch.
a) synthesis
b) decomp
c) single replacement
d) double replacement

TOR: Three elements, A+BC---AB+C
a) decomp
b) synthesis
c) Single replacement
d) Double replacement

TOR: Two elements, plus sign on the LEFT side.
a) synthesis
b) decomp
c) single replacement
d) double replacement

TOR: Two elements, plus sign on the RIGHT side.
a) synthesis
b) decomp
c) Single replacement
d) Double replacement

What do we call the 'things' on the LEFT side of the equation?
a) Product
b) Reactants
c) Formula
d) Elements

What do we call the 'things' on the RIGHT side of the equation
a) Product
b) Reactants
c) Formula
d) Elements

Exothermic applies to all the following, except?
a) Energy leaves the system
b) Most reactions will be exothermic
c) Will get 'hotter'
d) All of them are correct

In H2O +(NO3)2 (assume those numbers are little) how many oxygens do we have?
a) 3
b) 2
c) 6
d) 7

Atoms are not created nor destroyed during chemical reactions is known as?
a) Theory of mass
b) Law of mass
c) Chemistry
d) Law of conservation of mass

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