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10In a chemical equation, reactants are written on the right-hand side of the arrow.
Zinc reacts with dilute hydrochloric acid to produce hydrogen gas.
ZnCl₂ is the formula of zinc chloride.
A word equation uses chemical symbols and formulas.
In the reaction between zinc and hydrochloric acid, hydrogen gas is a product.
The arrow in a chemical equation means “reacts to form.”
Calcium carbonate produces calcium oxide and oxygen when heated.
Formula equation represents substances using symbols and formulas.
In Zn + 2HCl → ZnCl₂ + H₂, Zn is a product.
Heating is required to break calcium carbonate into simpler substances.
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Which of the following occurs during chemical reaction? A. Exchange of atoms B. Association of atoms C. Dissociation of molecule D. Friction between atoms
Which gas is produced when zinc reacts with dilute hydrochloric acid?
What is the formula of zinc chloride?
In a chemical equation, products are written on the:
Which of the following is a word equation?
What is formed when calcium carbonate is heated?
The symbol H₂ represents:
Which of the following is a reactant in CaCO₃ → CaO + CO₂?
The process of writing substances using symbols is called:
The number 2 in 2HCl indicates:
In a chemical reaction, substances that take part in reaction are called ______.
The substances formed after a reaction are called ______.
The reaction between zinc and hydrochloric acid produces ______ gas.
The chemical formula of hydrochloric acid is ______.
The chemical formula of ______ is CaCO3.
The arrow (→) in a chemical equation shows ______ of products.
Writing a reaction using words is called a ______.
Writing a reaction using symbols and formulas is called a ______.
When calcium carbonate is heated, it forms ______ and carbon dioxide.
Zn + 2HCl → ZnCl₂ + H₂ is an example of a ______.