3. Chemical Reactions

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.

How many moles of H₂ can be formed if a 2.83 g sample of Mg reacts with excess HCl according to the reaction: Mg + 2HCl → MgCl₂ + H₂?

How many moles of H₂ can be formed if a 2.97 g sample of Mg reacts with excess HCl according to the reaction: Mg + 2HCl → MgCl₂ + H₂?

How many moles of carbon are needed to react with 525 g of hematite (Fe2O3) in the following reaction: Fe2O3 + 3C → 2Fe + 3CO?

How many moles of carbon dioxide are produced in the combustion reaction of 65.14 g of C5H10(g)?2C5H10(g) + 15O2(g) → 10CO2(g) + 10H2O(l)

How many moles of oxygen gas (O2) are produced when 58.6 g of KNO3 decomposes according to the reaction: 4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g)? The molar mass of KNO3 is 101.11 g/mol.

How many moles of oxygen gas (O2) are produced when 58.6 g of KNO3 decomposes according to the reaction: 4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g)? The molar mass of KNO3 is 101.11 g/mol.

Hydrogen gas can be formed by the reaction of methane with water according to the equation: CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g). In a particular reaction, 25.5 L of methane gas (measured at a pressure of 730 torr and a temperature of 298 K) is used. How many liters of hydrogen gas are produced at the same conditions?

If 1.688 g of BaCl2·2H2O is mixed with an excess of Na2SO4 to form 200.0 mL of solution, what is the mass of BaSO4 that can form?

If 100.0 mL of 0.100 M Na2SO4 is added to 200.0 mL of 0.150 M NaCl, what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

If 241.94 grams of H2O (molar mass 18.02 g/mol) are produced in a reaction, how many moles of Sr(C2H3O2)2 (molar mass 183.71 g/mol) will also be produced, assuming the reaction is: Sr(C2H3O2)2 + 2 H2O → Sr(OH)2 + 2 C2H4O2?

If the reaction yield is 94.4%, what mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? The balanced chemical equation is: Mg (s) + 2 H2O (l) → Mg(OH)2 (s) + H2 (g).

In a stoichiometric reaction, if the volume of the reaction vessel is 1.50 L and the rate of formation of Br2 is 0.020 mol/L·s, what amount of Br2 (in moles) is formed during the first 15.0 seconds of the reaction?

If you begin with 1.3109 g of iron(III) chloride hexahydrate (FeCl3·6H2O) and it is the limiting reactant, calculate the theoretical yield (in grams) of the product, Fe(C5H7O2)3, assuming complete reaction.

If you have 3.2 grams of Zn, how many liters of H2 gas could be produced in the following chemical reaction at STP? Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)