# Chemistry 101

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The Chemistry 101 calculator provides equations and constants related to introductory university chemistry.  The functions available include topics that would be covered in a typical Chemistry 101 course, including introduction to the properties and characteristics of matter, the chemical foundations of matter, chemical equations, and the fundamentals of reactions. Periodic Table data with units conversions

# Usage

This calculator provides a number of constants and equations typically encountered in Chemistry 101, including chemistry equations, chemical element data, molecular constants, Planck constants, and Boltzmann constants.

## Chemical Equations

The early gas laws were developed to define the relationships between the pressure, volume, and temperature of gases. Gases behave in a similar way over a wide variety of conditions because, to a good approximation, they all have widely spaced molecules. The earlier gas laws are now considered as special cases of the ideal gas equation, with one or more of the variables held constant.1 Provided in this calculator are Boyle's Law, Charles's Law, Gay-Lussac's Law, and the Combined Gas Law.

• Ideal Gas Law:    PV = n•R•T
• Charles Law:    V_1T_2 = V_2T_1
• Boyles Law:    P_1V_1 = P_2V_2
• Gay-Lussac Law:      T_1P_2 = T_2P_1
• Combined Gas Law:    PV / T = k

The relative amounts expressed here define the amount of a substance in a sample of matter or the relative amounts of substances combined in solutions.

## Chemical Elements

This calculator tab provides the following data for each atomic element:

• Name Atomic Number
• Symbol
• Atomic Weight (au - atomic mass units)
• Melting Point (Co)
• Boiling Point (Co)
• Density (Kg/m3)
• Year Discovered
• Ionization Energy (eV - electron volts)
• radius - empirical (pm - picometers)
• radius - calculated (pm - picometers)
• radius - van der Waals (pm - picometers)
• Group (representing column in Periodic Table

Along with the periodic table, we provide equations that pertain to many, if not all, chemical elements, including the Rydberg Equation, Debroglie Wavelength, and Avogadro's Number.