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Molar concentration of mass and volume

Calculator allows to determine the molar concentration of the solution.            


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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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Radioactive decay

The calculator calculates how much radioactive material remains after a certain period of time.      
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Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.
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ROCE - an indicator of the efficiency of investment

The calculator calculates ROCE on the basis of these pre-tax profits, total capital and current liabilities ROCE (called Return On Capital Employed) - an indicator of the efficiency and profitability of the investment, which is the capital of the company involved.            
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Perpetual calendar

jak obliczyć dzień tygodnia na podstawie daty?
Calculator gives what day of the week for the date specified by the user.