Which equation is balanced?
Responses
2Al+3F2→2AlF3
2 upper case A lower case l plus 3 upper case F subscript 2 end subscript rightward arrow 2 upper case A lower case l upper case F subscript 3 end subscript
Mg+2O2→2MgO
upper case M lower case g plus 2 upper case O subscript 2 end subscript rightward arrow 2 upper case M lower case g upper case O
Al+3O2→Al2O3
upper case A lower case l plus 3 upper case O subscript 2 end subscript rightward arrow upper case A lower case l subscript 2 end subscript upper case O subscript 3 end subscript
Na+F2→2NaF
upper case N lower case a plus upper case F subscript 2 end subscript rightward arrow 2 upper case N lower case a upper case F
The balanced equation is 2Al + 3F2 → 2AlF3.
To determine if an equation is balanced, you need to ensure that there is an equal number of each type of atom on both sides of the equation. Here's how you can check if the equation is balanced:
Step 1: Count the number of atoms on each side of the equation.
On the left side, we have 2 Al atoms and 6 F atoms (3 F2 molecules, so 3 x 2 = 6 F atoms).
On the right side, we have 2 Al atoms and 6 F atoms (2 AlF3 molecules, so 2 x 3 = 6 F atoms).
Step 2: Compare the number of atoms on both sides.
Since the number of atoms is the same for both Al and F, the equation is balanced.
Let's compare this to the other equation choices:
1. Mg + 2O2 → 2MgO
On the left side, we have 1 Mg atom and 4 O atoms (2 O2 molecules, so 2 x 2 = 4 O atoms).
On the right side, we have 2 Mg atoms and 2 O atoms (2 MgO molecules, so 2 x 1 = 2 Mg atoms and 2 x 1 = 2 O atoms).
Since the number of Mg atoms and the number of O atoms are different, the equation is not balanced.
2. Al + 3O2 → Al2O3
On the left side, we have 1 Al atom and 6 O atoms (3 O2 molecules, so 3 x 2 = 6 O atoms).
On the right side, we have 2 Al atoms and 3 O atoms (1 Al2O3 molecule, so 2 x 1 = 2 Al atoms and 3 x 1 = 3 O atoms).
Since the number of Al atoms and the number of O atoms are different, the equation is not balanced.
3. Na + F2 → 2NaF
On the left side, we have 1 Na atom and 2 F atoms (1 F2 molecule, so 1 x 2 = 2 F atoms).
On the right side, we have 2 Na atoms and 2 F atoms (2 NaF molecules, so 2 x 1 = 2 Na atoms and 2 x 1 = 2 F atoms).
Since the number of Na atoms and the number of F atoms are different, the equation is not balanced.
Therefore, the only balanced equation is 2Al + 3F2 → 2AlF3.
Na+F2→2NaF is the balanced equation.
upper case N lower case a plus upper case F subscript 2 end subscript rightward arrow 2 upper case N lower case a upper case F