Conservation of Matter

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What happens to the mass of an object when it is broken into smaller pieces?

Back

The mass remains the same; for example, if an Oreo cookie weighing 20 grams is crushed, the mass of the crumbs is still 20 grams.

Front

If you start with 30 grams of reactants, how much product will you have after the reaction?

Back

You will have 30 grams of product, as mass is conserved.

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

In the equation 2H2 + O2 -> 2H2O, what does the '2' in front of H2 represent?

Back

The '2' represents the coefficient, indicating that there are two molecules of hydrogen gas.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where reactants are transformed into products through the breaking and forming of chemical bonds.

Front

What is the significance of the arrow in a chemical equation?

Back

The arrow indicates the direction of the reaction, showing that reactants are converted into products.

Front

What is an example of a physical change?

Back

Crushing a cookie is a physical change because it alters the form but not the mass.