# chemyst Release 2.3.0

Useful functions to work with basic chemistry and stochiemetry

Keywords
Chemistry, Chem, Periodic, table
MIT
Install
``` pip install chemyst==2.3.0 ```

# The Chemyst library

To install chemyst run `pip install chemyst`

## Usage For P_total

```# gas_laws stands for Pressure, Volume, Number of Moles, R is the ideal gas law constant, T is temperature
from chemyst.gas_laws import P_total
# Mixture of 3 gases lets say
total_pressure = P_total([9.987, 2.33, 123.9])
print(total_pressure)
# OUTPUT: 136.217```

Args:

• pressure is the only argument to P_total
• It is a list of the partial pressure of all the gases in a mixture

## Usage For partial_pressure

```from chemyst.gas_laws import partial_pressure
# Args: num_moles, ideal_gas_law, temp, volume, is_temp_kelvin=True
pressureO2 = partial_pressure(2, 'atm', 31, 15.0, False)
print(pressureO2)
# OUTPUT: 13.2```

Args:

• num_of_moles is the number of moles of the given gas
• ideal_gas_law is the ideal gas law constant to use for the given pressure unit
• if the pressure unit is atm
• ideal_gas_law should be 'atm'
• if the pressure unit is kpa
• ideal_gas_law should be 'kpa'
• if the pressure unit is mmHg
• ideal_gas_law should be 'mmhg'
• temp is the given temperature can be either Celsius or Kelvin
• volume is the volume of the container
• is_temp_kelvin determines whether the temperature should be converter to Kelvin or not
• if the temperature is in celsius is_temp_kelvin should equal false

## Usage For the conversions module

```from chemyst.conversions import moles_to_mass, mass_to_moles, atoms_to_grams, grams_to_atoms, ml_to_l, l_to_ml
# Moles to mass OUTPUT: 512g
moles_to_mass(16, 32)
# Mass to moles OUTPUT: 16.0
mass_to_moles(512, 32)
# Atoms to grams OUTPUT: 7.18e20
atoms_to_grams(1352, 32)
# Grams to atoms OUTPUT: 1.88e24
grams_to_atoms(100, 32)
# Mililiters to liters OUTPUT: 1 liter
ml_to_l(1000)
# Liters to mililiters OUTPUT: 1000ml
l_to_ml(1)```

Args:

• moles_to_mass(num_moles, molar_mass)
• num_moles is the number of moles to be converted to grams
• molar_mass is the mass of the element in grams
• for example O2 would have a molar mass of 32
• mass_to_moles(g_of_element, molar_mass)
• g_of_element is the amount of grams which will be converted to moles
• molar_mass is the mass of the element in grams
• atoms_to_grams(num_atoms, molar_mass)
• num_atoms is the number of atoms to be converted to grams
• molar_mass is the mass of the element in grams
• grams_to_atoms(g_of_element, molar_mass)
• g_of_element is the amount of grams which will be converted to moles
• molar_mass is the mass of the element in grams
• ml_to_l(ml)
• ml is the number of mililiters to convert into liters
• l_to_ml(l)
• l is the number of liters to convert into mililiters

## Usage for the molar module

### Molar and finding the moles

The molar module gives the Molar amount (M) from the moles and volume of a solution

```from chemyst.molar import molar, find_moles
# Find the Molar amount of 3 moles of sugar in 5 liters of water
molar(3, 5) # OUTPUT: 0.6M
# Find the number of moles of sugar with the Volume and Moles of the same siolution
find_moles(0.6, 5) # OUTPUT: 3 Moles Sugar```

## Usage For the yields module

### Theoretical yield

The yields module is slightly different than the others

the theoretical_yield() function takes 3 arguments:

• actual_yield
• the yield given in the equation
• mole_ratio_top which is
• From the balanced equation given, the number of moles of the wanted element
• mole_ratio_bottom which likewise is
• From the balanced equation given, the number of moles of the given element

IMPORTANT: the theoretical_yield() function arguments MUST all be moles
this can be easily achieved by using the `moles_to_mass` and `mass_to_moles` functions of `chemyst.conversions`

### Percent Yield

the percent yield() function take 2 arguments

• actual_yield
• yield given in the equation
• theoretical_yield
• this yield can be calculated using the theoretical_yield() function

IMPORTANT: the percent_yield() function arguments MUST all be grams
this can be easily achieved by using the `moles_to_mass` and `mass_to_moles` functions of `chemyst.conversions`