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The addition of a catalyst to a chemical reaction provides an alternate pathway that
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
The collision theory states that a reaction is most likely to occur when the reactants collide with the proper
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
Which process is commonly used to separate a mixture of ethanol and water?
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
An open flask is half filled with water at 25°C. Phase equilibrium can be reached after
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
Which list of symbols represents nonmetals, only?
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
What occurs when a magnesium atom becomes a magnesium ion?
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
What is the number of electrons in an atom that has 20 protons and 17 neutrons?
20
the flask is stoppered
P, S, Cl
distillation
Electrons are lost and the oxidation number increases.
decreases the activation energy
energy and orientation
emit (Release ) energy
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