Which statement correctly describes the classification of chemical reactions into different categories?(1 point)
Responses
All reactions fit into a category, and a reaction can fit into only one category.
All reactions fit into a category, and a reaction can fit into only one category.
All reactions fit into a category, and some reactions can fit into more than one category.
All reactions fit into a category, and some reactions can fit into more than one category.
Not all reactions fit into a category, and a reaction can fit into only one category.
Not all reactions fit into a category, and a reaction can fit into only one category.
Not all reactions fit into a category, and some reactions can fit into more than one category.
Not all reactions fit into a category, and some reactions can fit into more than one category.
The correct statement that describes the classification of chemical reactions into different categories is:
"All reactions fit into a category, and some reactions can fit into more than one category."
The correct statement is: All reactions fit into a category, and some reactions can fit into more than one category.
In a synthesis reaction, two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2) to produce sodium chloride (NaCl). How many molecules of sodium chloride are produced?(1 point)
Responses
two
two
one
one
four
four
three
The correct answer is: one.
In the decomposition of water, why is twice as much hydrogen as oxygen formed?(1 point)
Responses
Hydrogen atoms are twice the size of oxygen atoms.
Hydrogen atoms are twice the size of oxygen atoms.
Some oxygen gas escapes the reaction, and hydrogen gas is conserved.
Some oxygen gas escapes the reaction, and hydrogen gas is conserved.
Hydrogen gas has two atoms, and oxygen gas has one atom.
Hydrogen gas has two atoms, and oxygen gas has one atom.
There are two atoms of hydrogen and one atom of oxygen in a water molecule.
The correct answer is: There are two atoms of hydrogen and one atom of oxygen in a water molecule.
Which component is transferred between substances in an oxygen-reduction reaction?(1 point)
Responses
electrons
electrons
energy
energy
oxygen
oxygen
protons
The correct answer is: electrons.
In a chemical reaction, substance A transfers electrons to substance B. Which statement is correct?(1 point)
Responses
Substance A is reduced and acts as the reducing agent.
Substance A is reduced and acts as the reducing agent.
Substance B is reduced and acts as the oxidizing agent.
Substance B is reduced and acts as the oxidizing agent.
Substance A is oxidized and acts as the oxidizing agent.
Substance A is oxidized and acts as the oxidizing agent.
Substance B is oxidized and acts as the reducing agent.