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A coffee-cup calorimeter contains 140.0 g of water at 25.2 °C . A 122.0-g block of copper metal is heated to 100.4 °C by putting it in a beaker of boiling water. The specific heat of Cu(s) is 0.385 J/g·K . The Cu is added to the calorimeter, and after a time the contents of the cup reach a constant temperature of 30.2 °C .What would be the final temperature of the system if all the heat lost by the copper block were absorbed by the water in the calorimeter?
gold forms a substitutional solid solution with silver. compute the weight percent of gold that must be added to silver
A 35.0mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 M NaOH solution. Compute the pH after the following volumes of base have been added.
An aqueous solution is saturated in both potassium chlorate and carbon dioxide gas at room temperature. What happens when the solution is warmed to 85 C
acid phosphatase was assayed at s 2x10-5 m. the km for the substrate was 5x10-4 m. at the end of one minute 2.5 of the
What is the molar ratio of initiator to sulfuryl chloride in the procedure? Why is so little initiator needed relative to the amount of chlorinating agent used
If a certain reaction has a rate constant of 9.51x10-9 L mol -1 s-1 at 500K as well as a rate constant of 1.10z10-5 L mol -1 s-1 at 600K, Explain what is the value of Ea
use a stock titrant concentration of 0.1000moll naoh determine the naoh concentrations prepared using the following
The hydration of norbornene and the bromination of trans-cinnamic acid are both examples of additions across a double bond. How many new stereocenters were generated in the hydration
Explain what reaction occurs when sodium hydroxide is added to the stearic acid in cyclohexane and water. Define how does this change the solubility of cyclohexane in water. Does HCL reverse this reaction as well as if so why
1. what mass of water vapor is produced when 0.750 moles of oxygen gas reacts with propane?2. how many molecules of
Explain what color would pH paper turn when exposed to your solutions labeled? Could someone please explain what these are
Given that 318 kJ of heat are released for each mole of Fe3O4 formed, what is the enthalpy change of the balanced reaction of formation of Fe3O4 from iron(ii) oxide and oxygen
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