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Chemistry AI Solver one mole at a time
Ask about reactions, moles, gases, solutions or bonding. The equation is balanced before it is used, and every conversion factor is shown so you can watch the units cancel.
Result
Your result will appear here.
Getting a chemistry explanation
Share the question
Type it or attach a clear photo of the problem set (PNG, JPG or WebP, 5 MB max). Subscripts and charges read from the photo are written back to you first.
Choose the depth
Middle school basics or college general chemistry — pick the grade, then a style such as an everyday analogy or quick exam revision.
Read the worked chain
The balanced equation comes first, then the mole ratio taken from it, then each conversion on its own line.
Practice the same idea
Finish with the verification tip and one similar problem, and use the follow-up button to keep asking in AI Chat.
What the chemistry tutor does
The stoichiometry chain, worked by hand
Using the example question: how many grams of water form from 4.0 g of hydrogen gas?
1. Balance the equation
2H₂ + O₂ → 2H₂O. Two molecules of hydrogen give two of water, so the mole ratio H₂ : H₂O is 1 : 1.
2. Grams to moles
Divide by the molar mass of H₂, about 2.016 g/mol: 4.0 g ÷ 2.016 g/mol ≈ 1.98 mol of H₂.
3. Moles to moles
Apply the ratio from step 1: 1.98 mol H₂ × (2 mol H₂O ÷ 2 mol H₂) = 1.98 mol H₂O.
4. Moles to grams
Multiply by the molar mass of water, about 18.02 g/mol: 1.98 mol × 18.02 g/mol ≈ 35.7 g, which rounds to 36 g given the two significant figures in 4.0 g.
Check with mass conservation
Burning 4.0 g of H₂ needs about 32 g of O₂, and 4.0 g + 32 g ≈ 36 g of water. The free molecular weight calculator gives molar masses for any formula.
Question types that suit it
Moles and stoichiometry
Limiting reagent, percent yield, and empirical versus molecular formulas.
Solutions and gases
Molarity, dilution with C₁V₁ = C₂V₂, and the ideal gas law PV = nRT.
Acids, bases and equilibrium
pH from concentration, Ka and Kb, ICE tables written as lists, and Le Chatelier shifts.
Bonding and structure
Lewis structures described in words, VSEPR shapes, polarity and why boiling points differ.
Thermochemistry
Enthalpy changes, Hess's law and heat from q = mcΔT.
Redox
Oxidation numbers, half-equations and balancing in acidic or basic solution.
Frequently asked questions
It describes them in words — which atoms bond, where lone pairs sit, how the glassware is arranged — because it writes text and cannot produce images.
It uses standard atomic masses unless your question gives different values, in which case yours win. Textbooks round slightly differently, so a small difference in the last digit is normal.
Only from numbers you provide. Type your burette readings and concentrations and it walks through the calculation, but it cannot see an indicator change color or judge an experiment it never observed.
Pro plans cover it* (*fair use: up to 300 runs a day across the writing, study and code tools). Without a plan, typing a question uses 2 credits and attaching a photo makes it 3. Visitors who are not signed in can preview the start of the answer at no cost.
Use it to learn the method and to check your own work, and follow your instructor's rules on AI tools. If you are unsure what is allowed, ask before submitting anything.
Yes. A slipped coefficient or a rounding choice can throw off a result, so confirm the balanced equation and the units yourself.
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Moles not adding up?
Watch the chain from balanced equation to grams, then work the practice problem yourself.
Explain my chemistry question- Balanced equations first
- Units cancel on every line
- Works from a photo