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Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25 kgof room-temperature water (about 25c ). You figure that you can boil water on the stove and pour it into the bath to raise the temperature The amount of boiling water required to raise the temperature of 25 of water in the bath to body temperature is 4.8 . In this process, the heat lost by the boiling water is equal to the heat gained by the room-temperature water. How much heat was transferred in this process?
The standard enthalpies of formation of SO3(g), S(g) and O(g) are -359.7, +278.8 and +249.0 kJ mol-1, respectively. Use these data to calculate the average bond energy (in kJ mol-1) of the S=O double bond.
Write the corresponding ionic and net ionic equations after Balancing these given equations
A compound with a molecular formula C9H12, showed the following signals in its 1H NMR spectrum: ? (CDCl3, ppm): 7.5-7.0 (m, 5H), 2.3 (septet, 1H), 1.3 (d, 6H).
Given the following reaction. (Equation not balanced.) ZnS + O2 ? ZnO + SO2 How many grams of SO2 can be made from the reaction of 18.5 grams of O2 with excess ZnS
If 115 of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m. ?
What difference do the + and - make? do you add/subtract protons? Which of the following species has the largest radius. A. Li+ B. Na+ C. K+ D. Ar E. Cl-
A standard solution was made when 1.276g of pure copper wire (MM= 63.546g/mol) was weighed, dissolved in concentrated HNO3, and diluted to 1.00x102mL. What is the concentration of the stock solution
determine the molarity of the naohsodium hydroxide solution. in an acid-base titration 22.13 ml of a sodium hydroxide
Why does a piece of potato break down a 100% hydrogen peroxide solution faster than lets say a 75% hydrogen peroxide and 25% water
The cis and trans geometric isomers of a compound can have different chemical and physical properties. Draw the structure of the geometric isomer of 2-pentene that has the lower melting point
If the final temperature of the combined liquids is 28.5°C and the heat capacity of the calorimeter is 19.3 J/°C, determine the specific heat of methanol.
A child discovered that her coin is missing and there is a hole in her pocket. She turned back and walked 24m east along the sidewalk. Then, she stopped for 18s and decided to head back to school.
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