Answers edited by Al E.
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What does it mean if a process is enthalpy-driven?
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How many structural isomers does the molecule below have? The molecule below count as one isomer.
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What is Hrxn?
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Does the following resonance contributing structure of the given is correct?
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What mass of water would you need to have 15.0 moles of #H_2O#?
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The half life of iron-59 is 44.5 days. After 133.5 days, 2.76 g of iron-59 remains. What was the mass of the original sample?
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Question #3b059
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Question #07740
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Question #b2435
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How many grams of solute are needed to prepare each of the following solutions?
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What is the work done when a 22-N force pushes a cart 3.2 m?
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What is the final temperature when 100 g of water at 75#"^o#C is mixed with 75 g of water at 80#"^o#C?
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Question #33877
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Question #5da2c
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What occurs in a saturated solution, when the solvent evaporates? Does it remain saturated?
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Question #177c4
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How would you distinguish between primary, secondary, and tertiary alcohols?
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How is freezing point depression related to molality?
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Chemistry question over acids?
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10 grams of sucrose was used to prepare a 0.5 molar solution.
a) Approximately how much water (in mL was added)?
b) What is the molality of this solution?
c) What is the mole fraction of the water in the solution?
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What are the constitutional isomers of dimethyl cyclopentane?
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Balance the following redox equation and determine how many electrons were transferred.
#Zn(s) + Ni^(3+) (aq) → Zn^(2+) (aq) + Ni(s)#?
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Calculate the molar mass of the artificial sweetener?
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Which of the following is more stable?
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What are the possible resonance structures of #CH_3-CH=CH-CH=O# and #CH_3-COO^-#? What is the order of stability of the contributing resonance structures?
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How do you know the rate determining step?
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Please help?
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Help with Rate Constant Calculations?
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Question #028c4
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Question #c4329
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What is the standard reduction potential for the half reaction #Zn^(2+) (aq) + 2e^(-) -> Zn(s)#?
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Redox Reaction. Which of the following ions is reduced by copper metal?
a. Ca+ / b. Fe+3 / c. Hg+2 / d. Mg+2
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Question #7213b
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What is an example to how the inductive effect affects the equilibrium the strength of an acid?
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6-10. What are the name of the following compounds?
a. Ca(OH)2
b. Fe(OH)2
c. Zn(OH)2
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What is the freezing point of a solution of 155 g LiCl in 575 g H20?
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An object with a mass of #6 kg# is on a surface with a kinetic friction coefficient of # 8 #. How much force is necessary to accelerate the object horizontally at # 7 m/s^2#?
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Thermochemistry: Use the equations to answer the question.?
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The solubility of Pb(OH)2 in water is 6.7 *10^-6 M.What is its solubility in a buffer solution of pH=8 ?
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Question #fd1e0
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What happens to the volume of a gas if the pressure decreases by 5 %?
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Question #1c727
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What is the product of Potassium iodide + silver nitrate?
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Question #c8d5a
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What happens to the volume of a gas if the pressure decreases by 5 %?
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What is the mass of silver ring? (Assume a density of 0.998 g/mL for water.)
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Chemistry help? :(
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What exactly does the collision theory state?
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If depolarizing membrane potentials open voltage-gated sodium channels, what closes them?
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Balancing Redox Reactions. Balance the basic solution (ClO3)- + MnO2 = Cl- + (MnO4)- using half reaction?
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A basketball is inflated to a pressure of 1.60 atm in a 21.0°C garage. What is the pressure of the basketball outside where the temperature is 4.00°C?
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How much heat (in kJ) is released when 1.65 mol NaOH(s) is dissolved in water? (The molar heat of solution of NaOH is -445.1 kJ/mol)
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Question #762dd
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How can I solve this ??
dentify the electrolyte solution with the largest concentration of ions.
A. 1.0 moles KOH in 2.0 L water
B. 1.0 moles AlCl3 in 2.0 L water
C. 1.3 moles MgCl2 in 3.0 L water
D. 1.5 moles NaCl in 4.0 L water
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How many phases are in a homogeneous mixture?
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Question #46e01
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My ankle ligament is torn. How long does it take until I can walk or drive a car again? How long will I be on crutches?
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Why do aromatic rings absorb uv light ?
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Question #df4d5
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Question #b15c6
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Question #a3dc1
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How would I calculate the energy (in kilojoules) for 1 mole of a photon having a wavelength of 623nm? If I first calculated the energy of the photon in Joules and got 3.20x10^-37J.
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What is my actual yield of uranium hexabromide if start with 100 grams of uranium and get a percent yield of 83%?
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Question #fec87
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Li is pedaling his bike with a force of 220 N. The combined mass of Reese and her bike is 55 kg. What is the acceleration of his bike?
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Question #99100
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