In a 100ml dye bath with a concentration of 5x10to the -5 mol/L how many grams of dye are in that bath ( the molar weight of the dye is 808.9 G/mol

Question

How many grams of dye are in a 100 ml dye bath with a 5x10-5 concentration ?

Answer 1

100 ml x 1 L/1000 ml = 0.100 L of dye

dye is 5x10^-5 mol/L

moles of dye = 0.100 L x 5x10^-5 mol/L = 5x10^-6 moles

mass of dye = 5x10^-6 moles x 808.9 g/mol = 4.045x10^-3 g

Rounding to 1 significant figure, mass = 4x10^-3 g