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how much energy is created if a sample of CgH18 containing 7.63x1025 atoms of hydrogen reacts completely
If 2.40 g of CuSO4 is dissolved in 8.19 × 102 mL of 0.310 M NH3, calculate the concentrations of the following species at equilibrium.
Cu2+
NH3
Cu(NH3)42+
A gas has a solubility in water of 11.9 g/L at 15°C and 505 kPa of pressure. What is the pressure of the gas, in atm., (at the same temperature) if the solubility of the gas is 20 mg/L?
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734 grams of lithium sulfate are dissolved to make 2500.0 mL of solution. What is the Molarity of this Solution
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Describe the process you would follow to prepare 120 ml of a 2.0 M solution of HCl if you started with a 6.0 M stock solution.
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What is the percent (mass/volume) if 12 g of KCl is added to 50 mL of water to make 93 mL of solution?
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If 75 g. of Potassium Chloride (ionic compound) is dissolved in 250 grams of water, what will be the freezing point of the solution? Kf = 1.86
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The vapor pressure of pure water is 3.17 kPa. What will be the vapor pressure of a solution containing 13 g. of potassium permanganate (KMnO4) and 750 g of water?
An ancient asteroid, known as Bennu, is currently more than 200 million miles (321 million kilometers) from Earth. Imagine, you are in the NASA team inspecting the material of Bennu. You have figured out that the material has 5 orbit and its 4th orbit contains 13 electrons. Also, you have figured out that it can donate one electron and can bind with an earth element and after the bonding the compound is soluble in water. During the reaction process this material become activated and you can see an energy graph like this. Now, based on the observation, answer the following questions:
1.Write down the electron configuration of the atom. Does it follow the normal Aufbau Principle?Explain.
2.What kind of bond will be formed due to the reaction with the earth element? Explain your reason behind that. Why the compound became soluble? Can it make covalent bond in any way? (Not more than 50 words).
3. Write the rate law for an endothermic reaction in one sentence
This well-preserved, ancient asteroid, known as Bennu, is currently more than 200 million miles (321 million kilometers) from Earth. Imagine, you are in the NASA team inspecting the material of Bennu. You have figured out that the material has 5 orbit and its 4th orbit contains 13 electrons. Also, you have figured out that it can donate one electron and can bind with an earth element and after the bonding the compound is soluble in water. During the reaction process this material become activated and you can see an energy graph like this.
1. Write down the electron configuration of the atom.Does it follow the normal Aufbau Principle? Why?
2.Write down the electron configuration of the atom when it is in its charged state as stated above..
3.Write down 4 quantum numbers for the electron/s present in its 5th shell.
4. What kind of bond will be formed due to the reaction with the earth element? Explain. Why the compound became soluble? Can it make covalent bond in any way?
1.Write down the electron configuration of the atom when it is in its charged state as stated above. (One sentence)
2.Write down 4 quantum numbers for the electron/s present in its 5th shell.
3.What kind of bond will be formed due to the reaction with the earth element? Explain your reason behind that. Why the compound became soluble? Can it make covalent bond in any way? (Not more than 50 words).
4.Let’s consider, X3+ where the mass number is 41 and electron number is 20. What would be the neutron number? Write the mass number of two possible isobars for this element.
5.Prove Pauli’s exclusion principle for the electron that is present in the 4th shell with the electrons that are present in the 3s orbital of copper.
6.Write down two limitations for each of the Rutherford’s atomic model and Bohr’s model for the element copper. Relate the element for each case while describing the limitations.
Write down the electron configuration of the atom. Does it follow the normal Aufbau Principle? Yes/No. Write the reason in your own words. (Not more than 50 words)
Problems
1. The vapor pressure of pure water is 3.17 kPa. What will be the vapor pressure of a solution containing 18 g. of H2SO4 and 150 g of water?
2. If 75 g. of Lithium Chloride (ionic compound) is dissolved in 150 grams of water, what will be the freezing point of the solution?
3. What is the percent (volume/volume) if 12 ml of glycerol is added to 50 mL of water?
4. 0.50 grams of sodium sulfite is dissolved to make 0.050 mL of solution. What is the molarity of this solution?
5. Describe the process you would follow to prepare 150 ml of a 2.5 M solution of HCl if you started with a 5.0 M stock solution.
6. A gas has a solubility in water of 21.9 g/L at 15°C and 555 kPa of pressure. What is the pressure of the gas, in atm., (at the same temperature) if the solubility of the gas is 24 mg/L?
H2 (g) + I2 (g) ⇌ 2HI (g) 400. K for the reaction above, Kp = 62.5.
(a) If 0.40 mol of HI are introduced in 1.0 L flask heated to 400. K, calculate pressure HI (g) before any reaction.
(b) Calculate pressure ( each species when equilibrium established in (a) )
(c) H2 (g), I2 (g), HI (g) are introduced to flask at 400. K, pressures 0.40 atm, 0.40 atm, and 5.0 atm, respectively. Calculate value of Q and state direction reaction will proceed to reach equilibrium.
(d)H2 (g), I2 (g), and HI (g) are introduced to flask pressures 0.040, 0.020, 0.090 atm, respectively. If partial pressure HI (g) decreases 50%, calculate pressure of each species when equilibrium established.
(e) For part (d) draw three curves - one for each of three gases. The curves must show how the pressure of each of the three gases changes as equilibrium is established. Label each curve with the formula of the gas.
25 ° C. An aqueous solution of iodine containing 0.0516 g liter at temperature 4.412 g /liter containing CCL, is in equilibrium with the solution. 25° C If the solubility of iodine in water at temperature is 0.34 g /liter, multiply its solubility in ccl4
