Score: 0
Reputation • Free Samples
Shift: 1
0c
Time: 45
Rotate Device

Please rotate your device to landscape mode.

About Mole Mart

Pour reagent jars onto a balance and fill mole-quantity orders in this free online stoichiometry game about limiting reagents and percent yield.

Mole Mart is a stoichiometry game that turns the dreaded limiting-reagent worksheet into a kitchen rush. Every ticket asks for a number of moles of product, and the recipe card is a real balanced chemical equation. To fill an order you must convert between grams and moles using molar mass, pour each reagent in the ratio the equation demands and watch which jar empties first, because that jar is the limiting reagent and it alone decides the size of your batch.

Each mechanic maps to a real lab skill. The coefficients in the equation are the mole ratio: two moles of hydrogen per mole of oxygen for water, three of hydrogen per mole of nitrogen for ammonia. The balance reads grams while the recipe speaks moles, so you practice the grams to moles conversion on every pour. Unreacted stock left over is the excess reagent, and your score multiplier is percent yield, the ratio of what you actually produced to the theoretical maximum. Impure jars introduce percent purity: an eighty percent pure jar delivers fewer moles per gram, so you must pour extra mass to compensate.

Stoichiometry is the bookkeeping of chemistry. Industrial plants use these exact calculations to decide how much raw material to buy, pharmacists use them to dose medicines and engineers use them to size rocket fuel tanks. Between shifts, Mole Mart makes you do the same inventory planning: buy too much of a reagent you rarely need and the budget runs dry, buy too little and the rail fills with orders you cannot fill.

Key Science Concepts

What You'll Learn

Grade Level: Middle School, High School

Related Games

Explore more free science games at Science Games Lab

How to play

  1. Read the Ticket Tap a ticket on the top rail to load its recipe card onto the bench.
  2. Pour from Jars Drag a jar over the flask and hold to pour grams onto the scale.
  3. Mind the Moles Orders ask for moles but jars hold grams. The scale converts live for you.
  4. Serve the Window Tap the service window to push the flask. Precise pours earn full yield.
  5. Limiting Reagent The jar that empties first caps your batch. Leftovers fly back to the shelf.
  6. Restock Smart Between shifts, buy moles with coins. Rush orders pay double but hide the digits!

Frequently asked questions

Is Mole Mart free to play?
Yes. Mole Mart is completely free to play in your browser. There is no download, install or account needed.
What grade level is Mole Mart for?
Mole Mart is designed for Middle School, High School students and works well as a classroom activity or homework.
Does Mole Mart work on phones and tablets?
Yes. Mole Mart runs in any modern browser on desktop computers, Chromebooks, tablets and phones in landscape mode.

More like this

Back to the game