Balancing Chemical Equations Practice

The video tutorial explains how to balance the chemical equation for the decomposition of copper(II) nitrate (Cu(NO3)2). It begins by identifying the number of atoms on each side of the equation and proceeds through a series of steps to balance the nitrogen and oxygen atoms. The tutorial highlights the trial-and-error process involved in balancing equations, especially when multiple oxygen atoms are present in different compounds. The video concludes with a balanced equation and emphasizes the importance of adjusting coefficients to achieve balance.

What is the initial number of nitrogen atoms on the reactant side in the decomposition of copper(II) nitrate?

• 3 nitrogen atoms

• 4 nitrogen atoms

• 2 nitrogen atoms

• 1 nitrogen atom

How many oxygen atoms are initially present on the product side before any balancing?

• 5 oxygen atoms

• 6 oxygen atoms

• 7 oxygen atoms

• 8 oxygen atoms

What coefficient is initially placed in front of NO2 to start balancing the equation?

• 3

• 2

• 4

• 1

After placing a 2 in front of NO2, how many nitrogen atoms are on the product side?

• 1 nitrogen atom

• 2 nitrogen atoms

• 3 nitrogen atoms

• 4 nitrogen atoms

What is the total number of oxygen atoms after the initial balancing attempt?

• 10 oxygen atoms

• 7 oxygen atoms

• 8 oxygen atoms

• 9 oxygen atoms

What coefficient is used in front of NO2 to balance the nitrogen atoms completely?

• 5

• 4

• 3

• 2

How many copper atoms are present on the reactant side after balancing?

• 3 copper atoms

• 2 copper atoms

• 1 copper atom

• 4 copper atoms

What is the final number of oxygen atoms on both sides of the equation after balancing?

• 11 oxygen atoms

• 13 oxygen atoms

• 10 oxygen atoms

• 12 oxygen atoms

What is the main challenge mentioned in balancing equations with multiple oxygen atoms?

• Balancing hydrogen atoms

• Trial and error with oxygen atoms

• Balancing nitrogen atoms

• Finding the right coefficient for copper

What is the final balanced equation for the decomposition of copper(II) nitrate?

• 2Cu(NO3)2 → 2Cu + 4NO2 + 2O2

• Cu(NO3)2 → Cu + 2NO2 + O2

• 2Cu(NO3)2 → 2Cu + 4NO2 + O2

• Cu(NO3)2 → Cu + NO2 + O2