(EX) Chemical Reactions

Front

What is the chemical formula for aluminum oxide?

Back

Al₂O₃

Front

How many hydrogen atoms are in the molecule C₆H₁₂O₆?

Back

12

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What are reactants in a chemical equation?

Back

Reactants are the starting materials in a chemical reaction, found on the left side of the equation.

Front

How do you determine the number of molecules needed to balance a chemical equation?

Back

You adjust the coefficients in front of the chemical formulas to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the chemical formula for glucose?

Back

C₆H₁₂O₆

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

Front

What is the product of the reaction between magnesium and hydrochloric acid?

Back

The products are magnesium chloride (MgCl₂) and hydrogen gas (H₂).

Front

How many oxygen atoms are in the compound H₂O?

Back

1

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures the law of conservation of mass is upheld, meaning the number of atoms of each element is conserved.