3. Chemical Reactions

If you have 9 moles of CaCl2 and an excess of Na3PO4, how many moles of Ca3(PO4)2 can be formed according to the balanced equation: 3 CaCl2 + 2 Na3PO4 → Ca3(PO4)2 + 6 NaCl?

In the preparation of alum, which method is commonly used to remove excess reactants from the alum product?

A solution contains 0.10 mol/L BaCl2. What is the minimum volume (in L) of 0.20 mol/L Na2SO4 solution that must be added to 100.0 mL of the BaCl2 solution to initiate the precipitation of BaSO4? Assume complete mixing and that BaSO4 begins to precipitate when the product of [Ba^{2+}] and [SO_4^{2-}] exceeds the K_{sp} of BaSO4 (K_{sp} = 1.1 imes 10^{-10}).

How many grams of hydrogen are present in 2 moles of H_2O?

How many grams of sodium bicarbonate (NaHCO_3) are required to produce 40 mL of CO_2 gas at standard temperature and pressure (STP)?

If 4.0 moles of NaOH react completely with excess CO2 according to the equation 2 NaOH + CO2 → Na2CO3 + H2O, how many moles of Na2CO3 can be produced?

In the reaction 2 H2S + O2 → 2 S + 2 H2O, which species has the greatest rate of appearance?

Given the reaction: C2H6O + 3 O2 → 2 CO2 + 3 H2O, how many molecules of C2H6O are required to react completely with 1.36 mol of O2?

In neutral sodium bromide (NaBr), what is the ratio of sodium ions to bromide ions present in the compound?

In the balanced chemical equation for the synthesis of ammonia, N_2 + 3H_2 → 2NH_3, what is the mole ratio of hydrogen (H_2) to ammonia (NH_3)?

In the reaction 4Al + 3O_2 → 2Al_2O_3, how many moles of O_2 are consumed when 11.0 mol of Al are reacted?

Which of the following compounds produces the greatest number of moles of ions per mole of formula units when dissolved in water?

What mass of Na2SO4 is required to prepare 2.5 L of a 2.0 M solution?

How many chloride ions are present in 65.5 mL of 0.210 M AlCl_3 solution?

How many milliliters of a 0.155 M KCl solution are required to contain 2.55 g of KCl?