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A solution is made by mixing 9.00 mmol of a weak acid and 3.00 mmol of the strong base. What is the resulting pH? More strong base is added until the equivalence point is reached. What is the pH of this solution at the equivalence point if the total volume is 48.0 mL ?
The rate constant of a first order reaction is 4.60x10-4 s-1 at 350C if the activation energy is 104KJ/mol, calculate the temprature
7. 0.500 g each of hydrogen, H2, and carbon monoxide, CO, are introduced into an evacuated 250. mL flask. What will be the total pressure (in atm) in the flask at 22ºC? How much of the pressure will be due to hydrogen
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
The Ksp for Mn(OH)2 is 2.0 x 10-13. At what pH will Mn(OH)2 begin to precipitate from a solution in which the initial concentration of Mn2+ is 0.10 M
Calcium carbonate and sand mixture with weight of 4 grams is reacted with excees of HCl results in the production of carbon dioxide then find out the percent of calcium carbonate in the original mixture?
Sodium nitrate decomposes upon heating to form sodium nitrite and oxygen gas. This reaction is sometimes used to produce small quantities of oxygen in the lab. How many grams of sodium nitrate must be heated to produce 128g of oxygen?
A buffer is initially 0.180M in 4-nitrophenol (HC6H4NO3) and 0.200M in potassium 4-nitrophenolate (KC6H4NO3). The Ka of 4-nitrophenol is 3.8*10^-4 and the buffer has a pOH = 3.47. If 0.20g on NaOH were added to 100ml of this buffer what would the ..
A running automobile produces CO at a rate of 188g CO per hour. A car is left idling in a garage 5.2m long, 4.0m wide, and 2.2 m high at 20 degrees C. How long would it take to build up a lethal concentration of CO of 1000 ppmv?
a particular brand of gasoline has a density of 0.737 rm gml. how many grams of this gasoline would fill a 14.4 gal
An Ideal gas is in a 375mL Container. Pressure inside is 1012 mmHg. Temp is 31.3 deg Celsius. How manly moles of Ideal Gas are there?
Write the step-wise acid-base reaction of the amino acid proline starting from its fully deprotonated form. Write the correct equilibrium constant expression for each reaction and indicate its numerical value
What type of energy, kinetic or potential, is contained in chemicals? What aspect of chemicals is changed during a chemical reaction such that reactions relate to chemical energy?
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