3. Chemical Reactions

Which of the following methods is used to determine the amount of each reactant consumed in a chemical reaction?

What volume of 0.220 M HBr solution (in mL) is required to obtain 0.0600 moles of HBr?

In the balanced chemical equation for the reaction: PbO2 + 4HCl → PbCl2 + Cl2 + 2H2O, what is the mole ratio of PbO2 to H2O?

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

In the reaction 4Al + 3O_2 → 2Al_2O_3, what is the minimum number of grams of O_2 required to produce 1.00 mole of Al_2O_3?

Consider the reaction: N2 + 3H2 → 2NH3. How many grams of N2 are required to produce 100.0 L of NH3 at STP?

How many atoms of fluorine are present in 5.6 × 10^{22} molecules of MgF_2?

In the reaction of potassium permanganate (KMnO4) with oxalic acid (C2H2O4) to produce carbon dioxide (CO2), how many moles of KMnO4 are consumed to form 0.886 moles of CO2? (Assume the balanced equation: 2 KMnO4 + 5 C2H2O4 + 3 H2SO4 → 2 MnSO4 + K2SO4 + 10 CO2 + 8 H2O)

How many molecules of N_2O_4 are present in 76.3 g of N_2O_4? (Molar mass of N_2O_4 = 92.02 g/mol)

When FeO reacts with 1 mole of O_2 to form Fe_3O_4, how many moles of Fe_3O_4 can be produced, assuming excess FeO is present? (Reaction: 6 FeO + O_2 → 2 Fe_3O_4)

In a solution containing 2.00 × 10^{-2} M Sr^{2+} and 1.50 × 10^{-3} M CrO_4^{2-}, what is the value of the reaction quotient Q for the precipitation of SrCrO_4? (Q = [Sr^{2+}][CrO_4^{2-}])

Given 3.2 moles of xenon hexafluoride (XeF_6), how many moles of fluorine atoms are present?

In a reaction between Mg^{2+} ions and Cl^{-} ions to form MgCl_2, how many moles of Cl^{-} ions are required to completely combine with 0.25 moles of Mg^{2+} ions?

A 500.0 mL aqueous solution has a concentration of 0.500 molal (m) NaBr. What mass of NaBr (in grams) must be present in the solution? (Assume the density of water is 1.00 g/mL.)

When 13.2 mol of Na reacts with excess water according to the equation 2 Na + 2 H_2O → 2 NaOH + H_2, what mass of hydrogen gas (H_2) is produced?