Chemical Reactions Vocabulary Quiz

What are the products of the chemical reaction shown in the image?

• CH4 and O2

• CO2 and H2O

• H2O and O2

• CH4 and CO2

What does the coefficient in a chemical equation represent?

• The number of atoms in a molecule

• The number of molecules in an equation

• The type of chemical reaction

• The temperature at which the reaction occurs

Tags

NGSS.HS-PS1-7

Why is a coefficient used in a chemical equation?

• To indicate the speed of the reaction

• To balance the equation according to conservation of mass

• To show the energy change in the reaction

• To identify the reactants and products

Tags

NGSS.HS-PS1-7

Which of the following is NOT a characteristic of a decomposition reaction?

• Involves a single reactant

• Produces multiple products

• Requires energy input

• Combines two reactants

What is the main characteristic of a double-replacement reaction?

• Formation of a single product

• Exchange of ions between two compounds

• Decomposition of a compound

• Combustion of a substance

Which law explains that the total mass of reactants equals the total mass of products?

• Law of Conservation of Energy

• Law of Conservation of Mass

• Law of Conservation of Momentum

• Law of Conservation of Charge

Tags

NGSS.HS-PS1-7

What is the chemical formula for water?

• H₂

• O₂

• H₂O

• CO₂

Tags

NGSS.MS-PS1-1

What is the coefficient of O₂ in the balanced equation 2H₂ + O₂ → 2H₂O?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What type of reaction is represented by 2H₂ + O₂ → 2H₂O?

• Decomposition

• Synthesis

• Single replacement

• Double replacement

What does the subscript "2" in H₂ indicate?

• Two molecules of hydrogen

• Two atoms of hydrogen

• Two electrons in hydrogen

• Two protons in hydrogen