addiemaygulley5614 addiemaygulley5614 22-02-2024 Chemistry contestada If 20.9 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be leftover? a) 0.45 mol b) 0.56 mol c) 0.66 mol d) 0.78 mol