Q: Chemistry
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Q: According to the balanced reaction below, calculate the moles of NH, gas that form when 4.2 |mol of ...
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Q: Calculate the absorbance value (A) for a solution that absorbs 68.5% of the light striking it. (Hint...
A: Percentage transmittance = 100- absorbance percentage
Q: A student followed the procedure in this experiment, using 49.20 mL of 1.031 molar HCl and 50.50 mL ...
A: Neutralization is the reaction that occurs between an acid and a base. The enthalpy of neutralizati...
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A: “Since you have asked multiple questions, we will solve the first question for you. If you want any ...
Q: I am still so confused on this question, can someone please explain? Thank you so much
A: lowest energy conformer :
Q: For the reaction 2HI (g)<----> H2 (g) + I2 (g) Kc=1.84. If a reaction mixture initially conta...
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Q: A steam of gas at 70oF, 14.3 psia and 50% saturated water vapor is passes through a drying tower whe...
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Q: The ms quantum number represents __. A) the magnetic properties of an electron B) the angular m...
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Q: The molal boiling point elevation constant K,=1.00 °C kg mol -1 for a certain substance X. When 38. ...
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Q: What is the volume of a solution containing 2.4 mol of lactose if the osmotic pressure is 850 torr a...
A: Osmotic pressure formula π=CRT where C = concentration R = Gas constant ...
Q: 13.) What is the maximum number of unpaired electrons that can occupy a p subshell?
A: Each orbits present in an element are divided into different subshells.Each subshells occupied speci...
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A: a) The reaction will be, CrIO33 ⇔ Cr3+aq + 3IO33-aq The solubility of Cr(IO3)3 is, Ksp = s 3s+0.253...
Q: Determine the pH of a 0.50 M NaF solution. The Ka of HF is 3.5 x 10-5. Enter the result to 2 decimal...
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Q: 4. A 41.3g piece of metal heated to 93.1°C and dropped into a calorimeter containing 58.3g of water ...
A: The given information is: (1) For metal: Mass = 41.3 g Initial temperature (T1)metal = 93.1°C Final ...
Q: Consider Figure 13.1. If the height of the mercury column in the leveling bulb is 21 mm greater t...
A: Solution : According to Boyle's law pressure is inversely proportional to the volume at a const...
Q: Which of the following cannot be a Lewis acid? а. CI Ob. NH3 C. BF3 d. H20
A: A Lewis acid is therefore any substance, such as the H+ ion, that can accept a pair of nonbonding el...
Q: A chemistry student needs 45.0 g of thiophene for an experiment. He has available 1.5 kg of a 8.28% ...
A: 8.28 % w/w means 8.28 g thiophene in 100 g solution.
Q: According to the Molecular Orbital Fill Chart below, NO+ has a bond order of __ and is __. ...
A: Nitrogen has atomic number 7 and it's electronic configuration is 1s2 2s2 2p3 and oxygen on the othe...
Q: A biochemist carefully measures the molarity of salt in 34. mL of photobacterium cell growth medium ...
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Q: 4. The equilibrium constant for O2 = 20 is 2.4547 (10²) atm. at 3100 K. What is the equilibrium cons...
A: Equilibrium constant is given by the ratio of concentration of the products and reactants when the r...
Q: Calculate the kinetic energy of a 0.15kg baseball moving at a speed of 45.0ms. Round your answer to ...
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Q: Apple cinnamon Glade air freshener has two fragrance molecules in it. The 'apple' molecule has a mol...
A: Graham's law of diffusion: At a given temperature, rate of diffusion (r) of a gas is inversely propo...
Q: 1. Write a balanced equation for the reaction between sodium carbonate (Na2CO3) andhydrochloric acid...
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Q: A 1.0 g sample of a small protein having a molecular weight of 50,000 g/mol is dissolved in 50.0 mL ...
A: Since we know that osmotic pressure is calculated by using the formula π = iCRT Where , π = osmotic...
Q: When some amount of KOH is added to a solution of ammonium hydroxide, Kb for ammonium hydroxidewill ...
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Q: Indicate the concentration of each ion present in the solution formed by mixing the following. (Assu...
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Q: What is the balanced chemical equation for the nitration of benzaldehyde with nitric acid/sulfuric a...
A: When benzaldehyde is treated with Nitric acid and Sulfuric acid at 273-283 K temperature, then meta ...
Q: 2.664×103 g of ethylene glycol, C2H4(OH)2, are dissolved in 2.00×103 g of water. What is the mole fr...
A: Mole fraction of ethylene glycol is the ratio of number of moles of ethylene glycol to the total num...
Q: Referring to the metabolic process involving glucose on p. 803, calculate the maximum number of mole...
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Q: The human eye can detect 2.45 x 10 -18 J of green light of a wavelength 520 nm. What are the number ...
A: Dear student I have given answer to your question in the image format.
Q: idea how gravimetric analysis provides accurate results despite of it being time consuming
A: Gravimetric analysis is the technique that involves the measurement of mass of an analyte as to dete...
Q: A 25.0 mL sample of a saturated Ca(OH)2 solution is titrated with 0.028 M HCI, and the equivalence p...
A: Given, Volume of Calcium hydroxide, Ca(OH)2 , V1= 25.0 mL = 0.025 L Molarity of HCl solution, M2= 0....
Q: If a current of 40.0x10-6 A is drawn from a solar cell for six months, how many faradays are involve...
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Q: What volume of 0.380 M KMnO4 would be required to titrate 0.33 g of K2[Cu(C2O4)2]⋅2H2O?
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Q: An average volume of 15.52 mL of HNO3(ag) is required to titrate a 250.00 mL of Ba (OH), which has a...
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Q: Question 2 Which of the following would be a stronger base considering the following pKp values? O 1...
A: The species which has the lower pKb values will be a strong base.
Q: Select following statements which describe the collision theory of reactivity. More than one statem...
A: According to collision theory of reactivity , reactions occur when reactant molecules " effectiv...
Q: Use the appropriate data from the table to calculate the change in enthalpy for this reaction: Mg(s...
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Q: A chemist prepares a solution of barium acetate BaC2H3O22 by measuring out 52.6g of barium acetate i...
A: Number of moles = mass/molar mass Molarity = moles/volume of solution(in L)
Q: Calculate the concentration of the chemist's working solution.
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Q: Organic chem please help solve
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Q: Balancing Chemical Equations
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Q: A 21.21 gram sample of iron is heated in the presence of excess iodine. A metal iodide is formed wit...
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Q: The vaporization of methanol CH₃OH(l) ⇌ CH₃OH(g) is an endothermic process in which ∆Hvap = 37.4 kJ/...
A: Given, vaporisation of methanol. CH₃OH(l) ⇌ CH₃OH(g) ∆Hvap = 37.4 kJ/mol ∆Svap = 111 J/mol・K. Calc...
Q: Provide products/starting material/reagents for the reactions below
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Q: BaCl2(aq)+ZnSO4(aq) complete ionic and net ionic equations
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Q: Unit 11 Q#8 Methanol, CH,OH, burns in oxygen to form carbon dioxide and water. What volume of oxygen...
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Q: Calculate the density of I2 at STP using the ideal gas law.
A: The question is based on the concept of ideal gas equation. using ideal gas equation , we have to ca...
Q: questions in the image. please answer all.
A: An oxyacid is an acid that consists of hydrogen, oxygen, and a third element. The third element is u...
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- question 15 You have decided to try a new video game called World of Alchemist Hordes (WoAH) and created a character named Artemis. Use the following information for this question Werewolf blood freezes at -12.0 degrees Arwenheit (°A) and boils at 28.0 °A. Its heat of fusion is 65.0 cal/g and heat of vaporization is 400. cal/g. The specific heat of liquid werewolf blood is 1.473 cal/g°A. Part a) What is the heat released in cal when 0.186 kg of frozen werewolf blood at -12.0 °A , melted to liquid? (Please show your work so I can understand going forward) Part b) What is the heat absorbed in cal when 0.186 kg of liquid werewolf blood at -5.0 °A, is heated to 22.0 °A? (Please show your work so I can understand going forward)Olivia and Jaime are trying to increase the temperature of a substance by heating it. . What is the quantity of heat in kiloJoules required to raise the temperature of 4.6 kg of the substance from-5∘C to 127 ∘C at a pressure of 1.0 atm? Please keep three significant figures. Useful information: Melting point =293 K heat of fusion =3.90 x 104 J/kg. boiling point is 423 K heat of vaporization 7.80 x 104 J/kg (at a pressure of 1.0 atm). The specific heats for the solid phase is 600 J/(kg K) The specific heats for the liquid phase is 1000 J/(kg K) The specific heats for the gaseous phase is 400 J/(kg K)Question 17 A substance is characterized by the thermodynamic data below. Using this, determine the amount of heat (in kJ) required to warm 125.0 grams of the substance from 4.2°C to its melting point, and then completely melt it. Cs, solid 1.92 J/g°C Cs, liquid 3.14 J/g°C Cs, gas 1.59 J/g°C ∆H fus 4.89 kJ/mol ∆H vap 50.88 kJ/mol Melting point 42.5°C Boiling point 176.2°C Molar mass 159.4 g/mol
- Which equations heat, cool and can either heat or cool the surroundings? C4H4S(s) → C4H4S(l) 4C(g) +4H(g) + S(g)→ C4H4S(g) C4H4S(l) → C4H4S(g)The heating curve for an unknown substance is shown below. Based on this curve and the information given, answer the question below. In addition to the heating curve above, you know the following information for this substance: • The Heat of Fusion is 38.3 cal/g The Heat of Vaporization is 89.5 cal/g • The Specific Heat in the liquid phase is 0.372 cal/g-°C Question: If you have 13.5 grams of this substance in the solid state at 14 °C (Point B), how much total heat energy (in calories) is required to completely transform it into a gas at 83 °C (Point E)?Suppose 75.0 g of water at 25.0°C is heated until it vaporizes at 100°C. How much heat was needed?Helpful information:Heat of fusion of water = 334 J/gSpecific heat of water = 4.184 J/g·°CHeat of vaporization of water = 2.26 x 103 J/g
- A 7.0 g ice cube is placed into 230 g if water. Calculate the temperature change in the water upon the complete melting of ice. Hint: Determine how much heat is absorbed by the melting ice and then use q=mcat to calculate the temperature change of the 230 g of water.What is the total amount of heat released when 94.0 g water at 80.0 °C cools to form ice at −30.0 °C?The heat of dissolution of a solid substance was determined using an insulated calorimeter containing 150 grams of water initially at 27.4°C. If the temperature of the water increased to 32.8°C, what is the heat of dissolution of the solid? a.) -8103 b.) 8103 c.) -3386J d.) 3386J
- How much energy is needed to heat 356 g of ice at -10 °C to 0 °C and melt it?Heat = (mass)(0.5038)(change in temperature)Heat = (mass)(79.7)Which phase change releases energy (exothermic)? Group of answer choices H2O (s) -> H2O (g) H2O (l) -> H2O (s) H2O (l) -> H2O (g) H2O (s) -> H2O (l)A quart of water (950 g) at 28.0°C was placed in ice. When the water cools to 4°C, how much heat is transferred to the ice? The specific heat of water is 4.184 J/g·°C. Answer: 95.4 kj, I just need steps ty!