Stoichiometry: mole-to-mole and mass conversions

What you’ll practice

This quiz targets the core stoichiometry workflow: start from a balanced equation, use mole ratios, and convert between moles and grams with molar mass.

Each question gives 4 options and there’s no timer, so you can focus on dimensional analysis and clean unit cancellation rather than speed.

Difficulty and question settings

Choose your question count before you start and set the difficulty to match your goals—quick review, steady skill-building, or a full mixed challenge.

Difficulty is balanced by mixing straightforward one-step conversions with multi-step problems that combine molar mass, coefficients, and unit tracking.

Common pitfalls to avoid

• Using an unbalanced equation (coefficients must be correct before ratios)
• Flipping the mole ratio (reactant/product coefficients in the wrong order)
• Mixing up grams and moles or skipping molar mass conversion
• Rounding too early and drifting from the best answer choice
• Forgetting units during setup (units should cancel to the target unit)

Tips for better accuracy

Write the given value with units, multiply by the mole ratio from the equation, then apply molar mass only when you must move between grams and moles. If your final unit isn’t what the question asks for, retrace the conversion chain and check each factor direction.