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A 28.7 g sample of ethylene glycol, a car radiator coolant, loses 676 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.
Calculate [OH-] in the following aqueous solution at 25 deg C: [H3O+] = 3.6×10^?2 M? I know you have to divide 1x10^-14 by the 3.6x10^-2 and the answer I got was 2.8x10^-17 but it said my answ
What is the change in internal energy (in J) of a system that absorbs 0.532 kJ of heat from its surroundings and has 0.225 kcal of work done on it? = j
Nitrogen and Oxygen gases may react to form nitrogen monoxide. At 1500 C, Kc=1.0*10-5. If .030 mol N2 amd O2 are sealed in a 1.0 L flask at 1500 C. what is the concentration of NO when equlibrium is
The temperature inside a balloon is raised from 25.0 degrees C to 250.0 degrees C. If the volume of cold air was 10.0 L, what is the volume of hot air
What is the sum of the coefficients when the following equation is balanced using the lowest, whole numbered coefficients
What is the enthalpy for reaction 1 reversed. Reversed equation: CO2-->CO+(1/2)O2 Express answers in kJ per mole.
Silver sulfide is the tarnish that forms over time on polished silver. If a saturated aqueous solution of it at a certain temperature has a [Ag+] = 4 x 10^-17, what is the solubility product of silv
Calculate OH- for each of the following solutions, and indicate whether the solution is acidic, basic, or neutral. h+ = 2.7×10?3.
How can you tell from the information provided with the balanced equation. How many mol of O2 are required to form 3.20 mol Fe2O3. How much heat is exchanged when 14.3 kg of iron rusts
Determine the equivalent acid-base equilibrium that results when each of the following pairs of solutions is mixed. 25.0 mL of 0.50 M NaOH + 12.0 mL of 1.50 M HCl Pick two initial conditions from fi
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries.
A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2 HgO(s)-----> 2 Hg(l) + O2(g) delta H rxn = 181.6 kJ (a) How much heat is needed to decompose 505 g o
When 26.0 mL of 0.675 M H2SO4 is added to 26.0 mL of 1.35 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and K
The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the alloy? (c of water is 4.184 J/g&ti
Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter
Five structural isomers have the formula C6H14. Where needed, draw the structure and give the IUPAC name of all five isomers
A 28.7 g sample of ethylene glycol, a car radiator coolant, loses 652 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.
An oxyacetylene flame is often used in the welding of metals. Estimate the flame temperature produced by the reaction. 2C2H2(g) + 5O2(g) --> 4CO2(g) + 2H2O(g) Assume the heat generated from this
The equilibrium constant, Kc, for the reaction at 25 C is 170. Suppose 15.6 g of N2O4 is placed in a 5.000-L flask at 25C. N2O4 (g) ---> 2 NO2 (g) Calculate the following
What is the change in internal energy (in J) of a system that absorbs 0.535 kJ of heat from its surroundings and has 0.362 kcal of work done on it
Show that for the adiabatic reversible expansion of an ideal gas, T1^(Cv/R)V1 = T2^(Cv/R)V2
Determine the pH change when 0.112 mol KOH is added to 1.00 L of a buffer solution that is 0.394 M in CH3COOH and 0.246 M in CH3COO-. Determine the pH change when 0.095 mol HI is added to 1.00 L of
When a sample of benzoic acid was burned in a bomb calorimeter having a calorimeter constant of 12.5 kJ/oC, the temperature of the calorimeter (including its contents) rose from 23.18oC to 27.65oC.
Assume the eccentric professor has a daily special request for her coffee. She likes to have the 250.0 mL of coffee frozen at -15.0°C overnight and then want it heated to 95°C when she gets