Balancing Chemical Equations Quiz

What is the primary goal of balancing chemical equations?

• To decrease the number of reactants

• To increase the number of products

• To satisfy the law of conservation of mass

• To change the chemical properties of the reactants

In a chemical reaction, what does the arrow symbol represent?

• To react

• To balance

• To conserve

• To produce

What is the role of coefficients in balancing chemical equations?

• They are used to increase the number of reactants

• They are used to multiply the subscripts to balance the equation

• They change the subscripts of compounds

• They are used to change the chemical properties

When balancing the equation with oxygen and carbon, what is the first step?

• Add more reactants

• Remove carbon atoms

• Add coefficients to balance oxygen atoms

• Change the subscripts of oxygen

Why can't subscripts be changed when balancing chemical equations?

• Because they are already balanced

• Because they are too small to change

• Because they define the identity of the compound

• Because they are not important

In the sodium and oxygen example, what is the purpose of adding coefficients?

• To change the chemical formula

• To decrease the number of products

• To balance the number of sodium atoms

• To increase the number of oxygen molecules

What is the lowest common multiple used for in balancing equations?

• To change the chemical properties

• To find a common factor for coefficients

• To decrease the number of products

• To increase the number of reactants

In the advanced balancing example, what is the significance of the number 24?

• It is the number of products

• It is the number of reactants

• It is the number of molecules produced

• It is the common multiple for balancing sulfur

What happens to the coefficients when balancing complex molecules?

• They are doubled

• They are adjusted to balance the equation

• They remain unchanged

• They are removed

What should you do if you need more practice with balancing equations?

• Skip to the next topic

• Add more reactants

• Change the subscripts

• Rewind and redo the lesson