--- title: "An AI chemistry tutor for every reaction | DuckyHelper" url: "https://duckyhelper.com/subjects/chemistry/" description: "An AI chemistry tutor that shows what atoms are doing: labelled pictures of bonds, steps for every equation, quizzes and flashcards. In the DuckyHelper Mac app." updated: "2026-10-09" --- Mac app # An AI chemistry tutor for every reaction DuckyHelper is an AI chemistry tutor that shows you what the atoms are doing. Ask what a chemical bond is and Eddy draws two atoms sharing a pair of electrons and labels each part. Ask why ice floats and it walks through the molecules, with real numbers. Then it works your equations step by step, gives hints before answers, and quizzes you. It is a Mac app, and Ducky helps on your own worksheet too. [Download for Mac](https://duckyhelper.com/download/)[Meet Eddy](https://duckyhelper.com/eddy/) [All films](https://duckyhelper.com/films/#dumbar-identity) One question, shown ## Chemistry you can see Atoms are too small to see, so a good chemistry answer is a picture with the right labels. Two questions from our films: ### What is a chemical bond? This is the picture Eddy made for the question: two hydrogen atoms, each nucleus marked, and the pair of electrons they share between them, labelled as a covalent bond. Ask what happens if you pull the atoms apart, and Eddy explains it out loud. ## Why ice floats, in four numbers | What | Number | Why it matters | | --- | --- | --- | | Liquid water at 4 °C | 1.000 grams per cubic centimeter | Water is densest at about 4 °C, so the coldest water near freezing rises and lakes freeze from the top down. | | Ice | about 9 percent less dense than water | Freezing locks each molecule to its neighbors in an open lattice, so the same mass takes up more room. | | Most solids | denser than their own liquid | Water is the odd one out: if ice sank, lakes would freeze from the bottom up. | | An iceberg | almost all of it below the waterline | Ice is only a little lighter than water, so only a small part of it rides above the surface. | Numbers from the USGS Water Science School page on water density (checked 2026-10-09). This is the kind of worked answer Eddy builds when you ask it to look something up: real sources, quoted, with numbered citations. Equations and problems ## Stoichiometry, one move at a time Paste or say the problem, or open your worksheet with Open a file. Ask for it step by step and you get 3 to 6 steps, one move each: convert to moles, use the ratio from the balanced equation, convert back. Ask why any step works and Eddy explains that move. [Guide: worked steps](https://docs.duckyhelper.com/study/steps/) Hints before answers In Eddy's homework mode you get a hint first and do the move yourself. In the Mac app, Hint opens a ladder: a nudge, a bigger hint, the worked step, and the answer last. Graphs and simulations Ask for a graph of a reaction rate or a gas law and it is one you can hover, pan and zoom, with sliders for the letters. Some questions open a small simulation you can play with and read the numbers from. Remember the elements Ask for flashcards of symbols, ions or polyatomic names. The ones you miss come back right before you would forget them. ## Chemistry study guides ### All chemistry guides Moles, stoichiometry, bonding, gas laws and reactions, each with a worked example. ### Ionic vs covalent bonds When atoms give electrons away and when they share them. ### Stoichiometry From grams to moles to grams, using the balanced equation. ### Balancing chemical equations Count each atom on both sides and fix the coefficients. ### Lewis structures Draw the shared pairs and the lone pairs of a molecule. ## Ask Eddy Say one of these out loud. Eddy picks how to show it: words, a picture or the board. Why does salt melt ice? Walk me through this stoichiometry problem Make flashcards of the noble gases [Download for Mac](https://duckyhelper.com/download/) ## How to use it [Guide: Your first lesson with Eddy](https://docs.duckyhelper.com/start/first-lesson/) ## Frequently asked questions ### Can an AI tutor help with chemistry homework? Yes. Open your worksheet in Eddy or ask about the problem out loud, and it works the problem in short steps with the math written out, giving a hint before each answer. On a Mac, press fn and ask about the problem already on your screen. ### Can it show me molecules and bonds? Ask to see a bond or a molecule and Eddy opens a picture on its desk, then labels the nuclei, the shared electrons and the bond as it names them. Click any part to ask about it. Made pictures are part of Plus and up; drawn diagrams work on any plan. ### Will it check my chemistry answers? Ask it to check your work and it looks at each step, not just the final number, and tells you which step to look at again. Quizzes mark each answer and say why a wrong one is wrong. ### Does it work on a school Chromebook? Not right now: DuckyHelper is a Mac app (macOS 14 or later, Apple silicon). There is no Chromebook or web version. On a Mac, Eddy brings steps, pictures, graphs, quizzes and flashcards, and Ducky sees and draws on your screen. ## Sources 1. [USGS Water Science School, Water density](https://www.usgs.gov/special-topics/water-science-school/science/water-density) (accessed 2026-10-09) ## More subjects ### Math: worked steps, moving graphs, and hints before the answer An AI math tutor that explains one move at a time: worked steps, graphs you can move, hints before answers. In the Mac app, right over your homework. ### Biology: labelled pictures you can tap, read and quiz yourself on An AI biology tutor that answers with labelled pictures: ask how blood clots or how muscles move, tap any part to ask more, then quiz yourself. On a Mac. ### Physics: simulations you can play with and every step worked through An AI physics tutor that shows the why: simulations you can play with, forces drawn out, worked steps with real numbers. In the DuckyHelper Mac app. ### History: labelled pictures, maps, timelines and sources you can check An AI history tutor that shows the past: labelled pictures, maps and timelines you can explore, and sources read with you and cited. In the DuckyHelper Mac app. ### Writing: feedback on your own draft, never a ghostwriter An AI writing tutor that reads your own draft with you, asks what you mean and points to what is unclear, and leaves the writing to you. On a Mac. ### Languages: speak out loud, get scored, and keep what you miss An AI language tutor you practice with out loud: hear a word in syllables, say it back, get each word scored, and keep what you miss as flashcards. ### Computer science: run it, step through it, and write it yourself An AI computer science tutor: run your code against tests, step through it line by line to see the variables change, and get hints instead of the solution. ### Music: chords on a labelled keyboard, strings, scales and rhythm An AI music theory tutor that shows the sound: why a minor chord sounds sad on a labelled keyboard, how a string makes a note, rhythm in numbers. On a Mac. ### Art: perspective you can change, and paintings explained part by part An AI art tutor that shows how pictures work: perspective drawn on a picture you can change, paintings explained part by part, art history read with you. ## Keep reading Free high school chemistry study guides: balancing equations, moles, stoichiometry, gas laws, bonding, Lewis structures, acids and pH, with worked examples. ### Try Eddy: four things to say out loud in your first minute Try Eddy in the DuckyHelper Mac app: open the Eddy tab, press Talk to Eddy and ask one of these questions out loud. ### Eddy: the voice tutor in the DuckyHelper Mac app's Eddy tab Eddy is the voice tutor in the DuckyHelper Mac app: talk out loud and it teaches on a blackboard, with labelled pictures, quizzes and your own homework file. ### Small sandboxes you run yourself: drag the ball, move a slider, read the numbers Ask DuckyHelper to show you how a pendulum, a projectile or a circuit works and get a small sandbox to run yourself: drag, change a slider, read the numbers. ### Worked steps, one move each, that you can keep, and graphs you can hover, zoom and slide Ask DuckyHelper to work it out and get worked steps, one move each, plus graphs you can hover, zoom and change with sliders. Keep the steps as a note. ### Every subject: one question per subject, shown on screen DuckyHelper is an AI tutor for any subject: math, the sciences, history, writing, languages, code, music and art, each explained out loud and shown on screen. ## See what the atoms are doing Get the Mac app, open the Eddy tab and ask your chemistry question out loud. [See what it does](https://duckyhelper.com/features/) The Mac app needs Apple silicon and macOS 14 Sonoma or later. There is no Chromebook, Windows or web version right now.