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Look at the following equation.

Fe + Cl2 → FeCl3

In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?

Blank 1:
Blank 2:
Blank 3:

1 answer

To balance the equation \( \text{Fe} + \text{Cl}_2 \rightarrow \text{FeCl}_3 \) according to the law of conservation of mass, you need to have the same number of each type of atom on both sides of the equation.

  1. On the left side, you have 1 iron (Fe) atom and 2 chlorine (Cl) atoms (from \( \text{Cl}_2 \)).
  2. On the right side, you have 1 iron (Fe) atom and 3 chlorine (Cl) atoms (from \( \text{FeCl}_3 \)).

To balance the equation, you need to adjust the coefficients. The balanced equation should look like this:

\[ 2 \text{Fe} + 3 \text{Cl}_2 \rightarrow 2 \text{FeCl}_3 \]

So the coefficients are:

  • Blank 1: 2 (for Fe)
  • Blank 2: 3 (for Cl2)
  • Blank 3: 2 (for FeCl3)

So, the final answers are:

Blank 1: 2
Blank 2: 3
Blank 3: 2