Balancing Chemical Equations

The video tutorial explains how to balance the chemical equation Ca + N2 yields Ca3N2. It begins by counting the atoms on each side of the equation, noting that there is one calcium and two nitrogen atoms on the reactant side, and three calciums and two nitrogens on the product side. The tutorial demonstrates adjusting the coefficients to balance the equation, specifically by adding a coefficient of 3 in front of calcium on the reactant side. This results in a balanced equation with three calciums and two nitrogens on both sides. The video concludes with a confirmation of the balanced equation, Ca + N2 yields Ca3N2, representing the reaction of calcium and nitrogen gas to form calcium nitride.

What is the initial number of calcium atoms on the reactant side of the equation Ca + N2 yields Ca3N2?

• One

• Four

• Two

• Three

When balancing chemical equations, what can be changed to achieve balance?

• The subscripts of the compounds

• The coefficients in front of the compounds

• The state of matter

• The chemical symbols

How many calcium atoms are present on the product side of the equation Ca + N2 yields Ca3N2?

• One

• Two

• Three

• Four

What is the coefficient needed in front of Ca to balance the equation Ca + N2 yields Ca3N2?

• 4

• 3

• 2

• 1

What is the final balanced equation for Ca + N2 yields Ca3N2?

• Ca + 2N2 yields Ca3N2

• 3Ca + N2 yields Ca3N2

• Ca + N2 yields Ca3N2

• 3Ca + N2 yields 3CaN2