Question

How many grams of solute are present in 11.0mL of 0.786 M K2Cr2O7?

Answer 1

use these 2 equations:

first find moles: \(Molarity =\dfrac{moles_{solute}}{L_{solution}}\)

then find mass: \(moles=\dfrac{mass}{Molar \;mass}\)

(you can find the molar mass of each element on the periodic table, but you need to add these up)

Answer 2

thanks!

Answer 3

no problem !