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Chemical
Ideal gas equation
Calculator based on the ideal gas law gives the value of the variable you want to calculate on the basis of these other variables.
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Chemical
Calculator enthalpy
Enthalpy calculator is used to calculate the heat transfer during the process kwazistatycznego occurring in a closed thermodynamic system under constant pressure (isobaric process).
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Chemical
Dilution of solutions
Legend of given volume and calculates the concentrations of the solutions before and after dilution of the volume of solution added is calculated.
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Chemical
Molar concentration of mass and volume
Calculator allows to determine the molar concentration of the solution.
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Financial
Calculator carat weight
Calculator calculates the weight of the ore from grams to carats, points, kilograms, milligrams and ounces.
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Life
Calculator spending on cigarettes
Calculator based on the price quoted for the package and the amount consumed per month package, gives the annual cost of smoking cigarettes.
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Verifiers
Verifier numbers EAN-13 preview
Verifier numbers EAN-13
Calculator allows you to verify the number entered EAN-13.
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Math
Mean and covariance matrix calculator
Covariance is a measure of the covariance of two variables (X and Y). The calculator calculates the average for the sample and the covariance between variables. Sets of X and Y must be the same number.
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Verifiers
NIP correctness in Poland
Jak sprawdzić poprawność numeru NIP?
Verifier allows you to validate the tax identification number entered