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121.
What is the term for a substance that decreases the rate of a chemical reaction?
Explanation:
122.
What is the product of the combustion of hydrocarbons in the presence of oxygen?
Explanation:
123.
What is the term for a reaction in which the number of atoms of each element is the same on both sides of the equation?
Explanation:
124.
What is the term for a reaction in which the reactants are completely converted into products, and it cannot be reversed?
Explanation:
125.
Which of the following represents a combustion reaction?
Explanation:
126.
In a chemical equation, what is the role of the arrow (→)?
Explanation:
127.
Which type of chemical reaction involves the exchange of ions between two compounds?
Explanation:
128.
In a chemical reaction, what is conserved according to the Law of Conservation of Mass?
Explanation:
129.
What is the term for a chemical reaction in which heat is absorbed from the surroundings?
Explanation:
130.
What type of chemical reaction involves the combination of a substance with oxygen, often accompanied by the release of heat and light?