def moles_in_solution(molarity, liters):
"""Finds the number of moles in a solution of a specified molarity
"""
_molarity = validate_measurement(molarity, MOLES / LITERS)
_liters = validate_measurement(liters, LITERS)
return _molarity * _liters
def molarity(moles, liters=None):
_moles = validate_measurement(moles, MOLES)
if liters == None:
return Measurement(_moles.value, MOLES / LITERS)
_liters = validate_measurement(liters, LITERS)
molarity = _moles / _liters
return molarity
def grams_in_solution(molarity: Measurement, molar_mass: Measurement,
liters: Measurement) -> Measurement:
""" Calculates the mass in grams of a compound in a solution of a specified molarity
"""
_molarity = validate_measurement(molarity, MOLES / LITERS)
_molar_mass = validate_measurement(molar_mass, GRAMS / MOLES)
_liters = validate_measurement(liters, LITERS)
return _liters * _molar_mass * _molarity
def volume_from_solution(moles: Measurement,
molarity: Measurement) -> Measurement:
"""Finds the volume of a solution that will contain the specified number of moles when taken
from a solution of a specified molarity
"""
_moles = validate_measurement(moles, MOLES)
_molarity = validate_measurement(molarity, MOLES / LITERS)
return _moles / _molarity
def molarity_of_solution(grams: Measurement, molar_mass: Measurement,
liters: Measurement) -> Measurement:
""" Calculates the molarity of a solution
"""
_grams = validate_measurement(grams, GRAMS)
_molar_mass = validate_measurement(molar_mass, GRAMS / MOLES)
_liters = validate_measurement(liters, LITERS)
_moles = _grams / _molar_mass
return _moles / _liters
def mol_formula_from_simple_formula(simple: str,
ex_molar_mass: Measurement) -> str:
_ex_molar_mass = validate_measurement(ex_molar_mass, GRAMS / MOLES)
_sm_molar_mass = molar_mass(simple)
multiplier = int(_ex_molar_mass.value / _sm_molar_mass.value)
simple_composition = composition(simple)
return f'{(simple_composition * multiplier):f}'
def molecules_in_mass(formula: str, grams: Measurement) -> Measurement:
_molar_mass = molar_mass(formula)
_grams = validate_measurement(grams, GRAMS)
_mass = _grams * Measurement(AVAGADROS_NUMBER, ATOM / MOLES) / _molar_mass
if _mass.value == 1:
return Measurement(_mass.value, 'atom')
else:
return Measurement(_mass.value, 'atoms')
def moles_from_grams(grams, formula):
_mmass = molar_mass(formula)
_grams = validate_measurement(grams, GRAMS)
value = _grams / _mmass
return Measurement(value, MOLES)