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When .514g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 degrees C to 29.4 degrees C. Find delta E(rxn) for the combustion of biphenylin kJ/mol. The heat capacity of the bomb calorimeter, determined ina separate experiment, is 5.86 kJ/C.
how many electrons must be gain or lost by each element to achieve a noble gas configuration of electrons. answer
An unknown salt is either NaF, NaCl or NaOCl. While 0.050 mol of the salt is dissolved in water to form 0.500 L of solution, the pH of the solution is 8.08. Which salt is it
When a 42 g sample of an alloy at 100.0 oC is dropped into 90.0 g of water at 22.6 oC, the final temperature is 30.5 oC. What is the specific heat of the alloy
What volume (L) of H2 at 745 torr and 20.oC can be prepared from 4.8 g of water? (Atomic weights: Fe = 55.85, O = 16.00, H = 1.008; 1 atm = 760 torr).
Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.)
one mole of silicon si has a mass of 28.086 g and one mole of carbon has a mass of 12.011 g. what is the massof one
How many liters of water are required to dissolve 5.55 grams of KOH and make a solution with a pH of 11.63
If the core electrons were totally effective at screening the valence electrons and the valence electrons provided no screening for each other, what would be the effective nuclear charge acting on the 3s and 3p valence electrons in P?
When talking about Hydroxyquinone, BHT and BHA as radical inhibhitars, they are commonly additives to foods such as Crystal Light. (BHA:to help protect flavor). How do these molecules function as radical inhibitors. Show how these molecules interc..
A 62g piece of ice at 0 degree celsius is added to a sample of water at 9 degree celsius. All of the ice melts and the temperature of the water decreases to 0degree celsius. How many grams of water were in the sample ?
You have aqueous solutuin of HCl, NaCH3COO and AgNO3. What are the ions that are present in these aqueous solution. When you mix all of the solutions together, what reaction, if any occurs. What heat is given off when 2.5g of iron rust according to..
Find out whether or not each reaction is a redox reaction. For those reactions that are redox reactions, recognize the substance being oxidized and the substance being reduced.
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