Question

A student reported the following percentages foe his unknown mixtures: 25%NH4Cl, 30%NaCl, and SiO2. Assuming that the calculations were done correctly, explain the student's error.

Answer 1

Please help, i dont understand.

Answer 2

and percentage of SiO2 is?

Answer 3

50%

Answer 4

Sorry

Answer 5

why does it have to be students error?! it can be error of the method :)

Answer 6

Can it be? Error of method, i didnt think of that....

Answer 7

every method has certain uncertainty within and uncertainty brings error

Answer 8

Ok thanks.