Balancing Chemical Equations

The video tutorial explains how to balance the chemical equation MgH2 + H2O. It begins by counting the atoms on each side of the equation, identifying the imbalance in oxygen atoms, and then adjusting the coefficients to balance both oxygen and hydrogen atoms. The tutorial concludes with a final check to ensure the equation is balanced.

What is the initial number of magnesium atoms on each side of the equation?

• One

• Two

• Three

• Four

How many hydrogen atoms are initially present on the reactant side?

• Four

• Two

• Six

• Eight

What is the total number of oxygen atoms on the product side before balancing?

• One

• Four

• Two

• Three

What coefficient is added in front of H2O to balance the oxygen atoms?

• 4

• 1

• 2

• 3

After balancing the oxygen atoms, how many hydrogen atoms are on the reactant side?

• Seven

• Six

• Five

• Four

What coefficient is used in front of H2 to balance the hydrogen atoms?

• 1

• 2

• 3

• 4

How many hydrogen atoms are on the product side after balancing?

• Six

• Four

• Seven

• Five

What is the final number of oxygen atoms on each side of the balanced equation?

• Four

• Three

• Two

• One

What is the final balanced equation for MgH2 + H2O?

• MgH2 + H2O -> Mg + 2H2O

• MgH2 + 2H2O -> Mg + 2H2 + O2

• MgH2 + 2H2O -> Mg + 2H2 + O

• MgH2 + 2H2O -> Mg + 2H2 + 2O