Multiple Choice: 1. The correct coefficient for the equation KCLO3_____ KCL + O2 A. 2,2,3 B. 2,3,2 C. 3,2,2 D. 2,1,3 2. The correct coefficient for the equation HCl + Mg(OH)2____ MgCl2 + HOH A. 2,1,1,2 B. 1,1,2,2, C. 2,2,1,1 D. 2,1,2,1
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- Question 20 options: Consider the problem below: (Equation 1): 2C(graphite) + 2O2(g) à 2CO2(g) ΔH = -787 kJ (Equation 2): 4CO(g) + 2O2(g) à 4CO2(g) ΔH = -1132 kJ (Equation 3): 4C(graphite) + 2O2(g) à 4CO(g) ΔH = ???????? kJ The ΔH for equation 3 is:______(express in kJ) Screen Reader VersionDENTIFY THE OXIDATION NUMBER OF EACH ELEMENT IN THE GIVEN CHEMICAL FORMULA. All answers to be entered via short answer are in the numerical format Include the sign (either positive or negative) E.g.: KI- What is the oxidation number of potassium?- Answer: +1- What is the oxidation number of iodine?- Answer: -1 Given problems: What is the oxidation number of OXYGEN in magnesium hydroxide Mg(OH)₂? What is the oxidation number of HYDROGEN in magnesium hydroxide Mg(OH)₂? What is the oxidation number of POTASSIUM in potassium dichromate K₂Cr₂O₇? What is the oxidation number of CHROMIUM in potassium dichromate K₂Cr₂O₇? What is the oxidation number of OXYGEN in potassium dichromate K₂Cr₂O₇? Identify the coefficient of each compound in the reaction. - All answers to be entered via short answer are in the numerical format Redox Reaction: I2O5 + CO -> I2 + CO2 -To balance the reaction, what must be the coefficient of I₂O₅? * Your answer -To balance the…The value of Kw at 50°C is 5.48 × 10−14. Calculate the OH− concentration from the above solution at 50°C.
- Calculate deltaH1 Please provide 3 sig figs, units are KJ/mol, please only give number value in answer. Mg(s) + 1/2O2(g) --> MgO(s) deltaH1 = ? Mg(s) + 2H+(aq) --> Mg2+(aq) + H2(g) deltaH2 = +10.1 kJ/mol MgO(s) + 2H+(aq) --> Mg2+(aq) + H2O(l) deltaH3 = -5.00 kJ/mol 1/2O2(g) + H2(g) --> H2O(l) deltaH4 = -286.0 KJ/mol2 CoCl2(aq) + 8 NH3(aq) + H2O2(aq) + 2 NH4Cl(aq) 2 [Co(NH3)5Cl]Cl2(s) + 2 H2O(l) In a 50-mL Erlenmeyer flask, cobalt(II) chloride hexahydrate (1.075 g), an aqueous solution of ammonia (1.2 mL, 15 M), ammonium chloride (0.505 g), and hydrogen peroxide (1.0 mL, 30.0% (w/w), density = 1.10 g/mL) were combined. After completion of the reaction, [Co(NH3)5Cl]Cl2 (0.450 g) was isolated. What was the percent yield of the product?Given: Mg(OH)2 (s) <--> Mg2+(aq) + 2 OH- (aq) Kc = 5.60 x 10-12 F- (aq) + H2O (l) <--> HF (aq) + OH- (aq) Kc = 1.47 x 10-11 Calculate Kc for the following ( Change equations above so they sum to the equation below). Mg(OH)2 (s) + 2HF(aq) <--> Mg2+(aq) + 2F- (aq) + 2H2O (l) Kc = ?
- Which of the following correctly describes the values of % AE and the E-factor for the reaction below? (% AE = percent atom economy; E-factor = environmental factor) pick one option 4 NH3 + 5 O2 → 4 NO + 6 H2O % AE < 100; E-factor = 0 % AE = 100; E-factor > 0 % AE = 100; E-factor = 0 % AE = 0; E-factor > 0 % AE = 0; E-factor = 0QUESTION 4 Calculate ΔG°rxn for the reaction below at 25.0°C. 2H2O2 (ℓ) → 2H2O (ℓ) + O2 (g) Report your answer in kJ/mol to two decimal places. ΔG°f (kJ/mol) H2O2 (ℓ) -120.35 H2O (ℓ) -237.13Please only answer the last 3 on the table (AgClO4 , NH4C2H3O2, MgSO4).
- 5. Suppose the thermometer you used in your Charles's law experiment consistently gave low temperature readings. How would that influence the value of k' you would obtain?a. Make it too high.b. Make it too low.c. Would not influence it.Explain your answer:Don't use guidelines answer just specific answer correct don't use ai okk. Just solve accurate not explanation extra of guidelines okk. Will dislike ok Just 100% sure experts solve itPlease explain and answer 5, 6, and 7. Table 3. Heat of neutralization data and calculations Sample 1 Sample 2 [1] Volume of HCl (mL) 50.1 50.2 [2] Temperature of HCl (mL) 24.3 25.0 [3] Volume of NaOH (mL) 49.9 50.1 [4] Temperature of mixture after reaction (°C) 31.0 31.7 Temperature difference (°C) 6.7 6.7 [5] Number of calories evolved (cal) enter a positive value _________ _________ [6] Moles of H+ that were neutralized (mol) _________ _________ [7] Calories evolved per mole of H+ (cal/mol)