The grams of carbon monoxide that are needed to react is 148.68 grams
calculation
Step 1: find the moles of iron
moles =mass÷ molar mass
from periodic table the molar mass of Fe is 56 g/mol
= 198.5 g÷ 56 g/mol =3.54 moles
Step 2: use the mole ratio to determine the moles of carbon monoxide(Co)
that is from given equation Co : Fe is 3:2 therefore the moles of Co
= 3.54 x 3/2 = 5.31 moles
Step 3 : find mass of CO
mass = moles × molar mass
from periodic table the molar mass of Co = 12+16 = 28 g/mol
mass is therefore = 5.31 moles × 28 g/mol = 148.68 grams
