A student prepares aspirin using 17.530 grams of salicylic acid (MW = 138 g/mol) and 5.00 mL of acetic anhydride (MW = 102 g/mol, density = 1.081 g/mL). What is the theoretical yield of aspirin in grams?

What is the molarity of ZnCl2 that forms when 25.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . Zn(s)+CuCl2(aq)→ZnCl2(aq)+Cu(s) Part B: Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to add phosphates. The phosphate ion forms insoluble precipitates with calcium and magnesium ions, removing them from solution. A solution is 0.055 M in calcium chloride and 0.095 M in magnesium nitrate. What mass of sodium phosphate would you add to 1.0 L of this solution to completely eliminate the hard water ions? Assume complete reaction. Express your answer using two significant figures   Part C: Enter an equation for the precipitation reaction that occurs (if any) when solutions of ammonium chloride and silver nitrate are mixed. Express your answer as a chemical equation. Identify all of the phases in your answer. Enter noreaction if no precipitate is formed.

Part 1: 8.132g of Mg(NO3)2 are dissolved in 950.0 mL of water. Calculate the molarity of the Mg(NO3)2 solution.  Part 2: Calculate the molarity of a solution made by dissolving 2 g of glucose in sufficient water to form exactly 50 mL of solution. Part 3: If 55 grams of Barium nitrate were added to water to make a solution of 250 mL what owuld be the molarity of the resulting solution.

A sample of 8.51 g of solid calcium hydroxide is added to 35.0 mL of 0.480 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction. Physical states are optional. chemical equation: What is the limiting reactant? hydrochloric acid calcium hydroxide How many grams of salt are formed after the reaction is complete? mass of salt: How many grams of the excess reactant remain after the reaction is complete? excess reactant remaining: g

2. Given that 0.0643 mol Mg(OH)2 (58.32 g/mol) are theoretically formed in the reaction: 2 NaOH (aq) + MgCl2 (aq)  2 NaCl (aq) + Mg(OH)2 (s) calculate the percent yield of Mg(OH)2 (s) if you weighted the product at the end of the experiment and your actual yield is 3.18g.

Suppose a 500. mL flask is filled with 0.10 mol of CO, 1.3 mol of H₂O and 1.5 mol of H₂. This reaction becomes possible: CO(g) + H₂O(g) → CO₂(g) + H₂(g) Complete the table below, so that it lists the initial molarity of each compound, the change in molarity of each compound due to the reaction, and the equilibrium molarity of each compound after the reaction has come to equilibrium. Use x to stand for the unknown change in the molarity of CO2. You can leave out the M symbol for molarity. initial change equilibrium CO 0 H₂O 0 CO2 0 X 0 H₂ 0 0/0 X Ś

Hydrobromic acid dissolves solid iron according to the following reaction: Fe(s)+2HBr(aq)→FeBr2(aq)+H2(g) A.) What mass of HBr (in g) would you need to dissolve a 2.6−g pure iron bar on a padlock? Express your answer using two significant figures.   B.)What mass of H2 would be produced by the complete reaction of the iron bar? Express your answer using two significant figures.

A chemist prepares a solution of iron(II) bromide (FeBr,) by measuring out 97.1 mg of FeBr, into a 100. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 3 significant digits. olo mol x10 Ar

1. A student was asked to react silver nitrate with sodium during a stoichiometry lab. The student react 12.3 g of silver nitrate with 7.83 g of sodium sulfate to produce the following products.  Na2SO4(aq) + 2 AgNO3 (aq) -> Ag2SO4(s) + 2 NaNO3(aq) a) predict the mass of percipitate that the student should obtain.