← Chemistry Mr. D's Chemistry Games

Balance Quest

Walk the path. Balance the scales. Open the gates.

Every gate is a giant balance scale holding a chemical equation. Put the right coefficients in front of the formulas so each kind of atom has the same count on both sides. When the scale levels out, the gate opens.

Choose a world

Practice your own equations

Type one equation per line, like Fe + O2 -> Fe2O3. You can use ->, → or = for the arrow. Leave out the coefficients: the game works out the answer and you fill in every box.

How to play
  • Walk: W A S D or the arrow keys. On a tablet or phone, use the joystick.
  • Solve a gate: walk up to it and press E (or tap Solve).
  • Change a coefficient: press + or −, use the up and down arrow keys, or type a number from 1 to 12. A blank box counts as 1, just like in chemistry. Tab moves to the next box, Enter checks, Esc closes.
  • Atom counter: shows how many of each atom are on each side. A row turns green when it matches. In Worlds 3 and 4 it appears after you press Check.
  • Stars: 3 stars with no hints, 2 stars if you use 1 or 2 hints, 1 star if a hint shows you a number.
  • Coefficients must be the lowest whole numbers that balance the equation.
Settings