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For NH3 gas the standard enthalpy of formation Hf= -46 kJ/mol. Compute the heat of reaction when 1 mol of hydrogen gas reacts with excess nitrogen gas to produce NH3 at 298K and constant pressure 1 atm.
1. Write an equation describing the hydrolysis of one ester group in tannins by CaCO3. 2. How would longer roasting time of green coffee beans effect its caffeine content
The toxicity of (+)-carvone in rats is about 400 times greater than that of (-)-carvone. How do you account for this
What is the importance of chemistry to agriculture, Write summary of total one page and include references as well.
What is the energy associated with an electron transition in a H-atom from n=1 to n=3? from n=2 to n=4. What is the photon wavelength associated with each of the transitions in 8
What are the products expected to be formed in good yeild in the reaction 2-methyl-1-hexene is treated with a dialkylborane prepared from borane and an optically active sample of alpha-pinene, and then wit basic hydrogen peroxide.
A water sample has a pH of 8.21 and a total calcium concentration of 143 ppm. What is the total alkalinity of the water?
the bottom of a box has a surface area of 25.0 cm2. the mass of the box is 34.0 kilograms. acceleration due to gravity
A copper,(Cu(s) , electrode is immersed in a solution that is 1.00 M in ammonia,NH3 , and 1.00M in tetraamminecopper(II),[Cu(NH3)4]^2+ . If a standard hydrogen electrode is used as the cathode,
Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 3.2 g of methane reacts with 12.8 g of oxygen to produce 8.8 g of carbon dioxide
it takes 49.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. what is the specific heat
What is the total mass of AlCl3 in this sample? b. How many moles of AlCl3 are in this sample?
The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-fourth of the original. What is the final volume of the gas?
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