117. Задачка по химии №011 709

Vanadium with dichlorochromotropic acid (DCCA) was determined by the spectrophotometric method in three weighed portions of alloyed steel. The following results are obtained: 0.54, 0.48, 0.45%. Calculate the standard deviations of the confidence interval of the average value of the mass fraction of vanadium

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.