A reaction mixture initially contains .25 moles of ZnS and 0.25 moles O2. After the reaction in complete, how many moles of the excess reactant are left over? 2ZnS + 3O2 —> 2ZnO + 2SO2

For the reaction shown, find the limiting reactant for each of the initial quantities of reactants. express all answers as chemical forumals  2Li(s)+Br2(l)→2LiBr(s) -1  molLi  ; 1  molBr2 -1.8  molLi  ; 1  molBr2  -2.2  molLi  ; 1  molBr2 -

Assuming you started with 3.23 g of sodium bicarbonate and your actual yield of solid product is 1.20g, which reaction is more likely to be the correct one?

Which answer shows the correct way to balance the following equation?  Fe(s) + O2(g) → Fe2O3(s) a.  3Fe+302→ 3Fe2O3 b.  Fe +302 → 2/3Fe2O3 c. 4Fe+302 → 2Fe2O3 d. 2Fe +302 → 2Fe2O3

Consider the reaction of ammonia as below: 2 NH3(g) + 5 F2(g) N2F4(g) + 6 HF(g) ----> How many moles of ammonia (NH3) are needed to completely react with 13.6 mol of F2? O 34.0 mol 2.27 mol O 6.80 mol O 5.44 mol

Consider the decomposition reaction for ammonium hydroxide. NH,OH (aq) --> H2O (I) + NH3 (g) What volume of nitrogen trihydride will be collected if 43.8 grams of ammonium hydroxide is originally dissolved into solution? Select one: O 35.0 liters NH3 O 17.0 liters NH3 O 28.0 liters NH3 O 0.76 liters NH3

2AI(s) +6HCl(aq)----->2AIcl3 (aq) + 3H2 (g) If a sample of 4.0 mole of AI is added to a solution containing 5.0 moles of HCl, How many moles of AICl3 are formed?

When hydrogen sulfide gas is bubbled into a solution of NaOH, the reaction forms sodium sulfide and water according to the following unbalanced reaction. H₂S + 2NaOH → Na₂S + H₂O How many grams of sodium sulfide are formed if 2.75 g of hydrogen sulfide is bubbled into a solution containing 2.75 g of sodium hydroxide. (Atomic weights: Na 23.0, O 16.0, H 1.0, S 32.0)

9. Balance the following reaction: P4010 (s) 6PCI (s) → → lU POCI3 (1) \U POCI3 (1) What mass of each substance will be present after 15.00 g of P4010 and 15.00 g of PCI5 are reacted completely? (Hint: This is a limiting reactant problem!)

A sample of 0.75 g of hydrogen gas was obtained by reacting 32.5 g hydrochloric acid with 18.0 g magnesium. Mg(s) + 2 HCI (aq) --> MgCl₂ (aq) + H₂(g) What is the percent yield for this reaction? 100% 83% 41% 50%