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What quantity of energy, in joules, is required to raise the temperature of 454g of tin from room temperature, 25.0 degree C, to its melting point, 231.9 degrees C, and then melt the tin at that temperature? (the specific heat capacity of tin is 0.227 J/g . K, and the heat of fusion of this metal is 59.2 J/g.)
An aqueous solution contains 3.00% phenylalanine (C9H11NO2) by mass. Assume the phenylalanine is non-ionic and nonvolatile. Find the following
Assume the total heat capacity of the air C air=30 J/K. Describe what's the likely ice will ne after the system reaches equilibrium. b) Estimate theliekly final temperature after reaching equilibrium
Calculate how many moles of gas was in the bicycle tire when the total volume of gas collected is 5.60L{rm L} at a pressure of 765torr{rm torr} and a temperature of 25 °C^circ {rm C}.
the compound freon-12 (CCl2F2) is used as a coolant in refrigerators and air conditioners. It is produced through the following reaction: CCl4+SbF3-> CCl2F2+SbCl3. If 15.0 mole of freon-12 are to be produced, what mass of the carbon tetrachloride ..
A stock solution is prepared by adding 15 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 10 mL of the stock solution?
Calculate the concentrations of H2SO3, HSO3-, SO32-, H3O+ and OH- in a 0.025M H2SO3. The pH is 1.88 and the Ka1= 1.5 x 10-2 and Ka2 = 6.3 x 10-8.
The solubility of nitrogen in water exposed to the atmosphere, where the partial pressure of nitrogen is 593 mm, is 5.3 × 10-4 M. At the same temperature, what would be the solubility of pure nitrogen, at a pressure of 760 mm?
Atmospheric pressure at the top of Mt. Whitney in California is 440mmHg. How many atmospheres is this and how many pascals is this
30 mol H2 and .30 mol I2 are mixed in a 1.00L container, and the reaction forms HI. If Kc=.49 for this reaction, what is the equilibrium concentration of HI. I2(g) + H2(g) --- 2HI(g)
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 82.66% carbon and 17.34% hydrogen by mass. The mass of 158mL of the gas, measured at 556 mm Hg and 25 degrees C is found to be .275 g. What is the molecular formu..
If the actual yield is 220.0 g and the theoretical yield is 275.6 g then what will be the percent yield of ferrous sulfide.
The Ka of HNO2 is 7.1 x 10^-4. Use this to find the volume (mL) and pH of 0.0588 M KOH needed to reach the equivalence point(s) in titrations of 28.5 mL of 0.0380 M HNO2.
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