3. Chemical Reactions

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?

If you need to completely react 5.00 g of NaOH with H2SO4 according to the equation 2 NaOH + H2SO4 → Na2SO4 + 2 H2O, what is the minimum mass of H2SO4 required?

In the complex ion [Fe(SCN)6]^{3-}, what is the molar ratio of Fe^{3+} ions to [Fe(SCN)6]^{3-} ions?

In the reaction forming nitrogen monoxide, what mass of nitrogen (N_2) is required to react completely with 16 grams of oxygen (O_2)?N_2 + O_2 → 2NO

If 40.0 g of HCl react with an excess of magnesium metal according to the equation Mg + 2HCl → MgCl_2 + H_2, what is the theoretical yield of hydrogen gas (H_2) in grams?

In the reaction 2H_2 + O_2 ightarrow 2H_2O, how many moles of hydrogen gas (H_2) are required to react completely with 6.28 mol of oxygen gas (O_2)?

What mass of ammonia (NH_3) is formed when 5.36 g of nitrogen gas (N_2) reacts with excess hydrogen gas according to the equation N_2 + 3H_2 → 2NH_3?

In the reaction C_3H_8 + 5 O_2 → 3 CO_2 + 4 H_2O, how many moles of water (H_2O) will be produced if 1.2 mol of oxygen (O_2) reacts with excess propane (C_3H_8)?

How many grams of (NH_4)_3PO_4 are required to prepare 0.250 L of a 0.150 M (NH_4)_3PO_4 solution?