Question

Which of the following chemical equations is balanced correctly?

a




b




c




d

Answer 1

I can't see the actual equations — the choices (a–d) didn't come through. Could you paste the four reaction equations here?

While you paste them, here’s a quick reminder of how to check or balance them yourself:

1. Count atoms of each element on reactant and product sides.
2. Use coefficients (whole numbers placed before formulas) to make the counts equal. Do not change subscripts.
3. Balance elements that appear in only one compound first; leave elemental diatomics (O2, H2, etc.) for last.
4. If a polyatomic ion appears unchanged on both sides, balance it as a single unit.
5. Recount every element to confirm equality.

Examples:
- H2 + O2 → H2O → balanced as 2H2 + O2 → 2H2O
- Fe + O2 → Fe2O3 → balanced as 4Fe + 3O2 → 2Fe2O3
- C3H8 + O2 → CO2 + H2O → balanced as C3H8 + 5O2 → 3CO2 + 4H2O

Paste your options and I’ll tell you which is balanced and show the check.