11/05/19

Determine the enthalpy for the reaction
Using the equations 2 C₆H₆ (l) + 15 O₂ (g) → 12 CO₂ (g) + 6 H₂O (g)∆H° = -6271 kJ/mol C (s) + O₂ (g) → CO₂ (g) ∆H° = -393.5 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.6 kJ/mol Determine the... more
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11/05/19

Determine the enthalpy for the reaction...
Using the equations Si(s) + 2 Cl₂ (g) → SiCl₄ (s) ∆H° = -640.1 kJ/mol 2 Fe (s) + 3 Cl₂ (g) → 2 FeCl₃ (s) ∆H° = -800.0 kJ/mol Determine the enthalpy for the reaction 3 SiCl₄ (s) + 4 Fe (s) → 4 FeCl₃... more
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11/05/19

Using the equations H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol C (s) + 2 F₂ (g) → CF₄ (g) ∆H° = 141.3 kJ/mol Determine the enthalpy for the reaction C (s) + 4 HF (g) → CF₄ (g) + 2 H₂ (g).
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11/04/19

For the chemical reaction Ca (s) + ½ O₂ (g) → CaO (s) ∆H° = -635 kJ/mol. What is the enthalpy for the reaction 2 CaO (s) → 2 Ca (s) + O₂ (g)
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11/04/19

calorimetry question
A 138.7 g piece of copper (specific heat 0.38 J/g･°C) is heated and then placed into 400.0 g of water initially at 20.7°C. The water increases in temperature to 22.2°C. What is the initial... more
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11/04/19

calorimetry....

3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases by 11.11°C. Calculate ∆H for the dissolution of the unknown solid. (The... more
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11/04/19

If the balloon had a volume of 5 L at a depth of 50 m , what was the original volume of the balloon if we assume the pressure at the surface of the water is 14.7 psi?
Underwater pressure increases by 14.7 psi for every 10 m of depth. Standing on a boat in scuba gear, you fill a balloon with helium.
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11/04/19

calorimetry ...
4.41 g of MgSO₄ is placed into 100.0 mL of water. The water's temperature increases by 6.70°C. Calculate ∆H, in kJ/mol, for the dissolution of MgSO₄. (The specific heat of water is 4.18 J/g･°C and... more
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11/04/19

calorimetry....
When 1.231 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter increases from 22.41°C to 26.63°C. If the heat capacity of the calorimeter... more
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11/04/19

calorimetry....
When 0.0501 mol of an unknown hydrocarbon is burned in a bomb calorimeter, the calorimeter increases in temperature by 2.19°C. If the heat capacity of the bomb calorimeter is 1.229 kJ/°C, what is... more
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11/04/19

Calculate the amount (in g) of NaOH required to prepare 150 mL of 3 M NaOH solution
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11/04/19

constant pressure calorimeter
In a constant‑pressure calorimeter,  of 70.0 mL of 0.330M Ba(OH) was added to 70mL of 0.660 mm HCL.The reaction caused the temperature of the solution to rise from 22.90 to 27.4 If the solution has... more
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11/04/19

Chemistry Solubility Math Question 13
Ksp for AgCl is 1.77E-10. What is the molar solubility of AgCl in a solution of 0.28 M NaCl?
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11/04/19

Chemistry Solubility Math Question 12
Ksp for BaSO4 is 1.07E-10. What is the molar solubility of BaSO4?
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11/04/19

Chemistry Solubility Math Question 11
Determine the solubility of aluminum hydroxide, Al(OH)3, in a buffer solution at a pH of 7. Ksp = 3.7E-15
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11/04/19

If you start with 82.4 g of hydrochloric acid, how many liters of hydrogen gas at STP will form? Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g)
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11/04/19

In the reaction, 2 H3PO4(aq) + 3 Ca(OH)2(aq) 6 H2O(l) + Ca3(PO4)2(aq), how many grams of H3PO4 will be produced from 326.4 grams of Ca3(PO4)2?
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11/04/19

Which statement is FALSE about quantum mechanics?

-Moving electrons have wave like properties, and thus can only occupy those energy levels that can exactly accommodate the electron's wavelength?-It is not possible to know both an electron's... more
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11/04/19

Consider this reaction: 2H2(g) + O2(g) = 2H20(g) First if 5.74g of H2 reacted with 32.0 of O2, determine the limiting reactant. Second, what theoretical mass of product of H20 would be produced

Step by step where each number came from and why you are getting those numbers.Specifically answer what is the limiting reactant and state the mass of product for H2O
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11/04/19

Determining the Lattice Energy of MX2
The enthalpy of formation of MX2 is -745 kJ/mol. The enthalpy of sublimation of M is 143 kJ/mol. The first and second ionization energies of M are IE 705 kJ/mol and IE 1403 kJ/mol. The electron... more
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11/03/19

At equilibrium, a 1.0 L reaction vessel contains 2.3 mol of Mg(OH)₂ and 0.170 mol of OH⁻. What is the equilibrium concentration of Mg²⁺

. What is the equilibrium concentration of Mg²⁺ based on the reaction: Mg(OH)₂ (s) ⇌ Mg²⁺ (aq) + 2 OH⁻ (aq) Kc = 1.80 x 10⁻¹¹
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11/03/19

At equilibrium, a reaction vessel contains 4.50 atm of Br₂ and 1.10 atm of NBr₃. According to the reaction: 2 NBr₃ (g) ⇌ N₂ (g) + 3 Br₂ (g) Kp = 4.8 Determine the equilibrium partial pressure of N₂.
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11/03/19

Consider the reaction: 2 HI (g) ⇌ H₂ (g) + I₂ (g) Kc = 7.21 If at equilibrium the reaction vessel contains 1.20 M of H₂ and 1.70 M I₂, the what is the equilibrium concentration of HI?
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11/03/19

Theoretical yield and percent yield of 1.92 g H2 is allowed to react with 9.73 g N2, producing 2.04 g NH3
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11/03/19

Calculate the concentration (in M) of ammonium ions when 10.3 mL of 0.803 M ammonium carbonate and 12.7 mL of 0.984 M ammonium chloride are combined.
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