Pls help it’s hard like rlly hard

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2