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Explain when a gas is cooled at constant volume form an primary temperature of 50 C to 25 C it loses 60J of heat. Define when the same gas is cooled from 50C to 25C at constant pressure it loses 100J of heat. State what is the value of enthalpy change delta H when the gas is heated from 25C to 50 C at constant volume?
A can of Mountain Dew soda contains 46 g of sugar. Assuming that your body completely digests this sugar, 170 kcal of heat energy is available from the sugar. Approximately how many grams of water will you have to evaporate as sweat to lose this 1..
From the solubility data given, calculate the solubility products for the following compounds: a) SrF2, 7.3 x 10^-2 g/L b) Ag3PO4, 6.7 x 10^-3 g/L
the density of a particular brand of gasoline at room temperature is .70gml. if the gas tank of a car holds 10.0
What is the boiling point of a 4.08 m solution of naphthalene in benzene? The boiling point of benzene is 80.1°C
A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00. Assuming there was no Pb-206 present when the sample was formed, how old is it
Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of carbon-11 is administered to a patient for a PET scan, what percentage of carbon-11 will remain in the patient's system after 61.2 min
A particular sample of red brass consisting of 81.0% Cu and 19.0% Zn by mass has a density of 8780 kg/m^3. What is the molality of Zn in the solid solution?
We all know that a day at the beach leaves us worn-out. Assuming our body looses its heat energy to the water, and on a typical day of swimming at the beach we encounter 135.0kL of water at a constant Temperature. How much energy are we loosing to..
rate constants for the reaction no2g cog -----gt nog co2g are 1.31 m-1s-1 at 700. k and 23.0 m-1s-1 at 800. k.a what
What mass of ammonium chloride should be added to 2.45L of a 0.145M NH3 in order to obtain a buffer with a pH of 9.45
at 30oc the decomposition of hydrogen iodide into hydrogen and iodine is a second-order reaction. the rate constant for
How many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0 % yield?
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