iron (III) bromide is required as a catalyst for nitration true or false?

iron (III) bromide is required as a catalyst for nitration true or false?
Determine the formula mass of iron (III) bromide, a substance used as a catalyst in organic reactions. A 135.76 amu B 215.67 amu C 247.46 amu D 295.58 amu E 327.37 amu
A chemist prepares a solution of iron(III) bromide FeBr3 by measuring out 57.3g of iron(III) bromide into a 50.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's iron(III) bromide solution. Be sure your answer has the correct number of significant digits.
Calculate the volume in milliliters of a 0.674M iron(III) bromide solution that contains 100.g of iron(III) bromide FeBr3. Be sure your answer has the correct number of significant digits.
Calculate the volume in milliliters of a 0.56/molL iron(III) bromide solution that contains 50.0g of iron(III) bromide FeBr3 . Be sure your answer has the correct number of significant digits.
Calculate the volume in milliliters of a 1.33/molL iron(III) bromide solution that contains 150.g of iron(III) bromide FeBr3. Round your answer to 3significant digits.
Calculate the volume in milliliters of a 1.3M iron(III) bromide solution that contains 200 g of iron(III) bromide (FeBr digits Round your answer to 2 significant
Calculate the volume in milliliters of a .35 mol/L iron(III) bromide solution that contains 75 mmol of iron(III) bromide . Round your answer to 2 significant digits.
How many metal cations will be in the correct formula unit for iron(III) bromide?
A chemist must prepare 700 mL of 340. mM aqueous iron(III) bromide (FeBr, working solution. He'll do this by pouring out some 0.951 mol aqueous iron(III) bromide stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in ml of the iron(III) bromide stock solution that the chemist should pour out. Round your answer to 3 significant digits. Tome
What is the mass of insoluble silver bromide (187.77 g/mol) produced from 2.96 g of iron(III) bromide (295.55 g/mol) and aqueous silver nitrate? FeBr3(s) + AgNO3(aq) → AgBr(s) + Fe(NO3)3(aq)