#3.) hydrogen and oxygen react to produce water, according to the reaction 2h2 (g) + o2 (g) → 2h2o (l). if 3 moles of hydrogen react with 2 moles of oxygen and the yield in the reaction is 80%, how many moles of water are obtained? select one: a. 2 moles b. 2.4 moles c. 2.7 moles d. 3 moles#4.)  which of the following is true about the total number of reactants and the total number of products in the reaction shown below? c5h12(l) + 8o2(g) → 5co2(g) + 6h2o(g)select one: a. 9 moles of reactants chemically change into 11 moles of product. b. 9 grams of reactants chemically change into 11 grams of product. c. 9 liters of reactants chemically change into 11 liters of product. d. 9 atoms of reactants chemically change into 11 atoms of product.#9.)  how many moles of cu are needed to react with 1.23 moles of agno3? cu + 2agno3  → cu(no3)2  + 2agselect one: a. 0.62b. 2.5c. 3.51d. 0.55