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The ?H per mole of CaCl=-81.0kJ. Calculate the final temperature of an aqueous solution if 30g of CaCl2 is added to 100 mL of water at 23 degrees celcius. Assume that the specific heat of the solution is the same as that of water= 4.184 J*g/celcius
1. what mass of naohsnbspmust be added to 300 ml of hcl 0.25 m in order to completely neutralize this acid?2. during a
Write an equation that represents the reaction of 2% aqueous KMnO4 solution with 3-hexene, CH3-CH2-CH=CH-CH2-CH3
Determine the energy of a photon of each of these wavelengths. Which photon possesses more energy, the red or the purple
Which element will have five electrons in its Lewis symbol? a. argon b. boron
t 50°C the value of KW is 5.5 x 10-14. What are the molarities of hydronium ion and hydroxide ions in a neutral solution at this temperature.
What is the vapor pressure of the stored mixture?
when 25.0 ml of 0.500m h2so4 is added to 25.0ml of 1.00m koh in a coffee cup calorimeter at 23.5 degrees cel the
Identify the Lewis acid and Lewis base that lead to the formation of the following species: (a) AlCl4-, (b) Cd(CN)4 2-, (c) HCO3-, (d) H2SO4
Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition?
Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6 × 10-5) is titrated with 0.05 M NaOH
What mass of calcium can be produced by this process if a current of 6200 {\rm A} is applied for 35 {\rm h}? Assume that the electrolytic cell is 69 % efficient. also What is the minimum voltage needed to cause the electrolysis
Calculate the concentration in ppm of a pollutant that has been measured at 450 mg per 150 kg of sample.
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