Question

PLEASE ANSWER FAST

Answer 1

First we need to calculate the number of moles of FeS$_{2}$:

number of moles = mass (grams) / molecular mass (g/mol)

number of moles of FeS$_{2}$ = 198.2/120 = 1.65 moles

From the chemical reaction we deduce that:

if            4 moles of FeS$_{2}$ produces 8 moles of SO$_{2}$

then  1.65 moles of FeS$_{2}$ produces X moles of SO$_{2}$

X = (1.65×8)/4 = 3.3 moles of SO$_{2}$

Now we can calculate the mass of SO$_{2}$:

mass (grams) = number of moles × molecular mass (grams/mole)

mass of SO$_{2}$ = 3.3×64 = 211.2 g