ChemCalcsX for Mac

From Assimilate Systems:

A chemistry question and answer environment for students.
ChemCalcs provides an intuitive system for mastering fundamental skills and processes essential to the understanding of chemistry calculations and concepts. The unique standardised interface system allows students to problem-solve questions in a logical and consistent manner similar to techniques taught by chemistry educators. ChemCalcs can be integrated with many chemistry topics and courses.

Main Features:
- Naming elements and writing element symbols.
- Constructing atoms with protons, neutrons and electrons in electron clouds, shells or orbitals.
- Constructing isotope notation (mass number and atomic number with symbol).
- Construct Electronic Configurations for shells and orbitals.
- Construct formulas for molecules, ions and ionic compounds.
- Construct and balance equations.
- Construct and complete Type reactions.
- Solve calculations involving molar mass, moles, volume, mass, Avogadros number and number of particles.
- Solve stoichiometric calculations involving molar mass, moles, volume, mass, Avogadros number and number of particles.