Calculate the number of moles of aluminum and silicon required to produce 131.0 g of chromium based on the following equations:
a) 1.35 mol Al, 2.70 mol Si
b) 2.70 mol Al, 1.35 mol Si
c) 0.675 mol Al, 0.675 mol Si
d) 0.3375 mol Al, 0.675 mol Si