• Consider the combustion of ethylene: C2H4(g)+3O2(g)→2CO2(g)+2H2O(g)?

    Your answer: 
    1) f the concentration of C2H4 is decreasing at the rate of 3.7×10−2 M/s , what is the rate of change in the concentration of CO2? 2)What is the rate of change in the concentration of H2O? 3) Consider the following reaction: N2H4(g)+H2(g)→2NH3(g) If the rate of decrease for the partial pressure of N2H4 in a closed reaction vessel is 74 torr/h ,... show more
    6 mins ago
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  • Please Help!!!!!!?

    Your answer: 
    1) A certain first-order reaction has a rate constant of 2.05×10−2 s−1 at 16 ∘C. What is the value of k at 55 ∘C if Ea = 80.0 kJ/mol ? 2) Another first-order reaction also has a rate constant of 2.05×10−2 s−1 at 16 ∘C. What is the value of k at 55 ∘C if Ea = 124 kJ/mol ?
    8 mins ago
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  • A solution of distilled water was added to a section of dialysis tubing, which was suspended in a beaker of saturated salt solution...?

    Your answer: 
    A solution of distilled water was added to a section of dialysis tubing, which was suspended in a beaker of saturated salt solution. After a long incubation at room temperature the volume of liquid in the dialysis tubing decreased increased
    2 hours ago
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  • Which of the following equations does NOT demonstrate the law of conservation of mass?

    Your answer: 
    A. SnCl2 + 2 FeCl3 -> 2FeCl2 + SnCl4 B. NaOH + HCl -> NaCl + H2O C. P4 + 5O2 -> 2P2O10 D. 2Na + Cl2 -> 2NaCl
    2 hours ago
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  • Equilibrium concentrations?

    Your answer: 
    At a particular temperature, K = 3.7 ✕ 10−6 for the following reaction. 2 CO2(g) <-> 2 CO(g) + O2(g) If 2.7 moles of CO2 is initially placed into a 4.5-L vessel, calculate the equilibrium concentrations of all species.
    2 hours ago
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  • CHEM conversion help?

    Your answer: 
    Can you answer what 0.5 lb NaCl to grams would be? and how many moles in a) 7.3 x 10-2 g of (NH4)2CO3 Having a difficult time figuring these out, thank you!
    3 hours ago
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  • Equilibrium?

    Your answer: 
    A sample of gaseous PCl5 was introduced into an evacuated flask so that the pressure of pure PCl5 would be 0.52 atm at 434 K. However, PCl5 decomposes to gaseous PCl3 and Cl2, and the actual pressure in the flask was found to be 0.87 atm. Calculate Kp for the decomposition reaction below at 434 K. Also calculate K at this temperature.
    3 hours ago
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  • According to the reaction below , how many grams of precipitate will be produce from 14.60 mL of 0.349 M CaCL2 solution? Assume excess Na3PO?

    Your answer: 
    3 CaCL2 (aq) + 2 Na3PO 4 (aq) ———->Ca(PO4)2(s) + 6 NaCl(aq)
    4 hours ago
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  • Chemistry help?

    Your answer: 
    If 1000 J of heat energy removed from 100. g of water at 35.0 C, what is the final temperature of the water? ( csp=4.18J/g . C)
    4 hours ago
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  • What food does't contain iodine?

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    5 hours ago
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  • What is a good idea for a college level chemistry experiment?

    Your answer: 
    I need to propose an experiment that focuses on one of the following •Identification on an unknown •Quantitation of a known analyte •Demonstrates a fundamental chemistry principle Thank you!!!!
    5 hours ago
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  • Chemistry net ionic equation help?

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    5 hours ago
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  • Balanced net ionic equation help?

    Your answer: 
    Write the balanced NET IONIC equation for the reaction that occurs when ammonium perchlorate and calcium hydroxide are combined.
    6 hours ago
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  • Chemistry help?

    Your answer: 
    I'm stuck on one question that I can't figure out, I thought you needed Ka/Kb to go and solve for the pH. A buffer is prepared by adding 12.00 g of ammonium chloride (NH4Cl) to 250 mL of a solution 1.00 M in NH3. What is the pH of this buffer? Can anyone please explain?
    8 hours ago
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  • C H E M I S T R Y Problem 8.98 Part A and B. Mastering Chemistry 2018 Please Help?

    Your answer: 
    Part A With reference to the "Chemistry at Work" box on explosives, use bond enthalpies to estimate the enthalpy change for the explosion of 1.00 g of nitroglycerin. ANSWER: triangle H = 7.85 kJ Part B Write a balanced equation for the decomposition of TNT. Assume that, upon explosion, TNT decomposes into N2(g),CO2(g),H2O(g), and... show more
    9 hours ago
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  • Chemistry Question?

    Your answer: 
    If the initial pressure of C is 0.20 atm and zero for A and B, what is the equilibrium pressure of A? Kp=9.0 2C(g)=A(g)+B(g) A=[?]atm
    9 hours ago
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