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  • How would the temperature change in this chemical reaction?

    Your Answer: 
    I m studying exothermic and endothermic reactions. I did a lab on mixing vinegar and baking soda in a container. The temperature of the solution decreased. Also, the reaction produced carbon dioxide gas. What do you think will happen to the temperature of the container?
    15 mins ago
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  • Eletrolysis, help, please.?

    Your Answer: 
    Consider an electrochemical cell in which the following reaction occurs and predict which changes will increase the cell voltage. 2 Hcl (aq) + Ca (s) CaCl2 (aq) + H2 (g) I. increase the amount of Ca (s) II. decrease the pressure of H2 (g) III. decrease the [HCl (aq)] please, explain the tree aternatives. If we use the nerst equation we gonna... show more
    23 mins ago
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  • Does thermite have dangerous goods classification?

    Your Answer: 
    can it be sent pre-mixed in the post internationally? i understand the component parts can be sourced separately in nearly any country but need to know if can be sent mixed.
    27 mins ago
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  • Organic Chemistry Question! Please Help!?

    Your Answer: 
    I am doing a Chalcone Synthesis: Reactants: 2-methylbenzaldehyde and acetophenone What is my condensation product?
    32 mins ago
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  • Finding how many ml required to reach stoichiometric point?

    Your Answer: 
    Assuming 80 mg of vitamin C present in 29.57 mL of the orange juice, how many milliliters of 0.0102 M KIO3 would be required to reach the stoichiometric point?
    33 mins ago
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  • I have a chemistry question about Solutions.?

    Your Answer: 
    What volume of water must be added to a 12.0 M Hcl to make 650 mL of a 1.3M solutions. Answer: 580mL
    39 mins ago
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  • Suppose that we add 25.0 ml of 1.0 M HCL(aq) to 25.0 ml of a buffer solution that is both 0.500 M in HAc and 0.400 M in NaAc.?

    Your Answer: 
    Calculate the final pH in the solution Please help, i cannot get this problem in my lab!!
    56 mins ago
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  • What is the dissociation constant of Cu(NH3)4 +2?

    Your Answer: 
    In a 0.20 M solution of the salt Cu(NH3)4SO4, the concentration of Cu2+ ion is found to be 9.21 × 10−4 M. What is the dissociation constant of Cu(NH3)4 +2?
    56 mins ago
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  • Chemistry Help?

    Your Answer: 
    When you add 0.395 g of sodium metal to an excess of hydrochloric acid, you find that 4110 J of heat are produced. What is the enthalpy of the reaction as written below? 2Na(s) + 2HCl(aq) = 2NaCl(aq) + H2(g)
    1 hour ago
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  • Enthalpy Calculation?

    Your Answer: 
    consider the two reactions: 2NH3(g)+3N2O(g)=4N2(g)+3H2O(l) H=-1010 kJ 4NH3(g)+3O2(g)=2N2(g)+6H2O(l) H= 1531 kJ Using these two reactions, calculate and enter the enthalpy change for this reaction N2(g)+1/2O2(g)=N2O(g)
    1 hour ago
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  • Complete and balance the equation below using the method of half-reactions. (acidic)?

    Your Answer: 
    Cu(s) + NO3-(aq) → Cu2 (aq) + NO2(g)
    1 hour ago
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  • Chemistry Help?

    Your Answer: 
    How many grams of carbon dioxide are produced from 40 grams of propane? If the heat of the combustion is -2250 per mole, how much heat energy will be released? Can you tell me the steps in completing this problem?
    1 hour ago
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  • Identify the oxidizing agent and reducing agent after balancing the reaction below.?

    Your Answer: 
    a) Nal(aq) + 3HOCl(aq) → 2NaOH(aq) +H2(g) - b) I2O5(s) + 5CO(g) → I2(s) + 5CO2(g)
    1 hour ago
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  • Chem help?

    Your Answer: 
    What is the concentration (in M) of the chloride ion when 18.7 mL of a 0.561 M solution of barium chloride is combined with 19.7 mL of a 0.509 M solution of aluminum chloride? Assume the volumes are additive.
    2 hours ago
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