Laws of Chemical Combination Quiz

What does the Law of Conservation of Mass state about the mass of reactants and products in a chemical reaction?

• Mass is created during the reaction.

• Mass is destroyed during the reaction.

• Mass remains constant during the reaction.

• Mass is converted to energy.

In the Law of Definite Proportion, what remains constant in a compound?

• The temperature of the compound.

• The number of molecules.

• The ratio of masses of elements.

• The volume of the compound.

If you add an extra oxygen atom to water (H2O), what new compound is formed?

• Ozone (O3)

• Methane (CH4)

• Hydrogen peroxide (H2O2)

• Carbon dioxide (CO2)

According to the Law of Multiple Proportion, what is the relationship between the masses of the second element in different compounds?

• They are fractions.

• They are random numbers.

• They are negative numbers.

• They are small whole numbers.

In the example of carbon monoxide and carbon dioxide, what is the ratio of the mass of oxygen in these compounds?

• 1:1

• 1:2

• 2:1

• 3:1

What does G's Law of Combining Volumes state about the volumes of gaseous reactants and products?

• They are always equal.

• They are in fractional ratios.

• They are in simple whole number ratios.

• They are in random ratios.

In a reaction where 50 mL of hydrogen gas reacts with 25 mL of oxygen gas, how much water vapor is produced according to G's Law?

• 25 mL

• 50 mL

• 75 mL

• 100 mL

According to Avogadro's Law, what do equal volumes of gases at the same temperature and pressure contain?

• Equal numbers of molecules.

• Different volumes.

• Equal masses.

• Different numbers of molecules.

If two containers have the same volume and are at the same temperature and pressure, what can be said about the number of molecules in them according to Avogadro's Law?

• They have different volumes.

• They have different numbers of molecules.

• They have equal numbers of molecules.

• They have equal masses.

What is the main focus of Avogadro's Law?

• Number of molecules in gases.

• Volume of liquids.

• Mass of gases.

• Temperature of solids.