Chemistry solver
Chemistry, from
grams to moles and back.
Almost every quantitative chemistry question is the same journey: grams to moles, moles to moles through the balanced equation, moles back to grams. Solvecoon shows that route explicitly, so the next problem looks like a road you have already driven.
Free to try — 5 solves every day. No credit card.
How it works
Snap the question and the equation
Structures, mechanisms, and subscripted formulas rarely survive copy-paste. Capture them as a region.
Follow the conversion chain
Every unit conversion is its own line, with the conversion factor written as a fraction.
Check the balanced equation
Stoichiometry is only valid if the equation is balanced first, so that check comes before the math.
What it handles
Balancing equations
Including redox half-equations in acidic and basic conditions.
Stoichiometry
Mole ratios, limiting reactant, theoretical and percent yield.
Solutions
Molarity, dilution, concentration conversions, and titration calculations.
Gases
The ideal gas law, combined gas law, partial pressures, and molar volume.
Atomic structure and bonding
Electron configuration, Lewis structures, ionic and covalent bonding, and polarity.
Thermochemistry and equilibrium
Enthalpy changes, Hess's law, equilibrium expressions, and Le Chatelier predictions.
A real one, worked out
This is the shape of every answer: the result first, then the reasoning that got there.
Question
How many grams of NaCl are in 0.25 mol?
Answer
About 14.6 g
Steps
- 1Find the molar mass of NaCl from the periodic table.
- 2Na is 22.99 g/mol and Cl is 35.45 g/mol.
- 3Molar mass = 22.99 + 35.45 = 58.44 g/mol.
- 4Mass = moles x molar mass = 0.25 mol x 58.44 g/mol.
- 5Mass = 14.61 g, which rounds to 14.6 g at three significant figures.
The units cancel on purpose: mol x g/mol leaves grams. If your units do not cancel, the formula is upside down.
Balance first. Every stoichiometry answer built on an unbalanced equation is wrong.
What it will not do
- It will not be used on a graded chemistry test or a proctored exam.
- It will not read a structure that is half outside your selection.
- It will not give lab safety advice for real procedures. Ask your instructor.
- It will not assist with synthesizing anything dangerous or illegal, at any level of detail.
Solvecoon is a study aid, not an answer machine. Exams, graded quizzes, and proctored tests are off limits — see the acceptable use policy.
Questions people ask
- Can it read a structural formula from an image?
- Yes, snap it. It identifies the functional groups it can see and says which parts of the drawing are ambiguous.
- Does it do limiting reactant problems?
- Yes, by converting both reactants to moles of product and comparing, which also gives the excess left over.
- Will it show significant figures properly?
- It follows the significant figures in the data given and shows the unrounded value alongside.
- What about organic mechanisms?
- It can explain a mechanism step by step in words and identify the arrows a step needs. Drawing them is still on you.
Stuck on something?
Select it or snap it — Solvecoon understands it.
Add to Chrome →Free to try — 5 solves every day. No credit card.