The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate: 2NH4Cl(s)+Ba(OH)2⋅8H2O(s)→2NH3(aq)+BaCl2(aq)+10H2O(l)2NH4Cl(s)+Ba(OH)2⋅8H2O(s)→2NH3(aq)+BaCl2(aq)+10H2O(l) The ΔH for this reaction is 54.8 kJ . How much energy would be absorbed if 27.5 g of NH4ClNH4Cl reacts? Express your answer with the appropriate units.

One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with iron(II) chloride, which would react with silver nitrate solution like this: FeCl₂(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Fe Fe(NO3)₂(aq) The chemist adds 85.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected 7.2 mg of silver chloride. Calculate the concentration of iron(II) chloride contaminant in the original groundwater sample. Round your answer to 2 significant digits. 0-8 X 6

Write a balanced chemical equation for the following reaction in a basic solution.ClO–(aq) + Cr(OH)3(s) → Cl–(aq) + CrO42–(aq)  ClO–(aq) + Cr(OH)3(s) + 3 OH–(aq) → Cl–(aq) + CrO42–(aq) + 3 H2O( l) 3 ClO–(aq) + 2 Cr(OH)3(s) + 4 OH–(aq) → 3 Cl–(aq) + 2 CrO42–(aq) + 5 H2O( l) ClO–(aq) + Cr(OH)3(s) → Cl–(aq) + CrO42–(aq) + 3 H+(aq) 2 ClO–(aq) + 3 Cr(OH)3(s) + 3 OH–(aq) → 2 Cl–(aq) + 3 CrO42–(aq) + 6 H2O(l) 4 ClO–(aq) + Cr(OH)3(s) + 4 OH–(aq) → Cl–(aq) + CrO42–(aq) + 6 H2O( l)

Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of H2SO4 and KOH are mixed. OH(aq) + OH¯(aq) → H₂O(l) O H+ (aq) + OH(aq) + 2 K+ (aq) + SO4²-(aq) → H+ (aq) + OH¯(aq) + K₂SO4(s) O No reaction occurs. O 2 K+ (aq) + SO4²- (aq) → K₂SO4(s) H+ (aq) + OH Taq) + 2 K+ (aq) + SO42 (aq) → H₂O(l) + 2K+ (aq) + SO4²- (aq)

Here is the organic chemical equation for the reaction of an inorganic compound B with a big organic molecule A that might be found in plant or animal fats or oils: A + NB X HO OH OH + 3 HO Complete this description of the reaction by answering the questions in the table below. What is the chemical formula of B? What is the stoichiometric coefficient N? Are there any special reaction conditions X needed? (You can assume the reaction mixture is gently heated, and X is not "A") If you said there were special reaction conditions needed, what is X? In the drawing area below, draw the chemical structure of A. Ú 0 0 yes no Click and drag to start drawing a structure. 00 X Ś X :0 Ś

For each chemical reaction listed in the table below, decide whether the highlighted atom is being oxidized or reduced. CH4(9)+H₂O(g) → CO(g) + 3 H₂(g) Na₂CO3(s) + H₂PO4(aq) → Na₂HPO4(aq) + CO₂(g) + H₂O(1) 2H,S(aq)+O,(g) →2S(s)+2H,O) FeO(s)+CO(g) → Fe(s)+CO₂(g) Explanation reaction Check highlighted atom is being... oxidized O O O O reduced οιοιοιο O X neither oxidized nor reduced MacBook Air O O S © 2023 McGraw Hill LLC. All Rights Reserved. Terms of U=

Balance the following reaction. If a reactant or product is not present, put a zero (0) in the blank.  H+(aq) +  H2O(l) +  ClO-13(aq) +  e-1 <-->  Cl-1(g) +  H+(aq) +  H2O(l)

Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equation is balanced and contains state symbols after every reactant and product. HNO, (aq) + H2O(1) ローロ X

Which one of the following represents a combination reaction?   C2H4(g) + H2(g) → C2H6(g)       Fe(NO3)2(aq) + Na2S(aq) → FeS(s) + 2 NaNO3(aq)       Cr(s) + Pb(NO3)2(aq) → Cr(NO3)3(aq) + Pb(s)       2 KClO3(s) → 2 KCl(s) + 3 O2(g)

Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equation is balanced and contains state symbols after every reactant and product. HCIO (aq) + H2O(l) → ローロ Х 5 2 00 Ar