3. Chemical Reactions

How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq) + 2 FeCl3(aq) → Fe2S3(s) + 6 NaCl(aq)

How many grams of oxygen (O2) are needed to completely react with 1.33 g of butyric acid (C4H8O2) in a combustion reaction?

In the reaction 2H_2 + O_2 ightarrow 2H_2O, what is the total number of molecules reacting when 2 molecules of H_2 react with 1 molecule of O_2?

Which of the following could NOT be used to determine reaction stoichiometry?

How many molecules of H2S are required to form 79.0 g of sulfur according to the reaction: 2 H2S(g) + SO2(g) → 3 S(s) + 2 H2O(l)? Assume excess SO2.

An iron bar weighing 56.0 g reacts completely with excess hydrochloric acid according to the equation: Fe + 2HCl → FeCl2 + H2. What mass of H2 is produced?

How many grams of K2Cr2O7 are required to prepare 250 mL of a 0.10 M solution?

Consider the following reaction:2 PbS (s) + 3 O2 (g) → 2 PbO (s) + 2 SO2 (g)ΔHrxn = -827.4 kJWhat mass of PbS has reacted if 853 kJ of heat is produced?

In the balanced chemical equation for the reaction between ethylenediaminetetraacetic acid (EDTA) and calcium ion (Ca^{2+}), what is the mole ratio of EDTA to Ca^{2+}?

Given the reaction 2Al + 3CuCl2 → 2AlCl3 + 3Cu, if 10.5 g of CuCl2 react with 12.4 g of Al, what is the limiting reactant?

When 24.3 g of magnesium reacts completely with excess hydrochloric acid according to the equation Mg + 2HCl → MgCl_2 + H_2, how many grams of magnesium chloride (MgCl_2) are produced?

Which of the following is a valid mole ratio from the balanced equation 2Fe2O3 + 3C → 4Fe + 3CO2?

When 0.100 mole of BaCl_2 reacts completely with excess Na_2SO_4 according to the equation BaCl_2 + Na_2SO_4 → BaSO_4 + 2NaCl, how many moles of BaSO_4 are produced?

Given 10.0 g of phosphorus (P) and 35.0 g of chlorine (Cl2), what mass of phosphorus pentachloride (PCl5) can be produced?

In the reaction N_2 + 3H_2 → 2NH_3, how many moles of hydrogen gas (H_2) are required to completely react with 0.85 moles of nitrogen gas (N_2)?