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If the heat of combustion for a specific compound is -1360.0 kJ/mol and its molar mass is 58.69 g/mol, how many grams of this compound must you burn to release 416.70 kJ of heat?
(a) Given that the molar mass of H3PO4 is 97.994 grams, determine the number of grams of H3PO4 needed to prepare 0.35L of a 1.25M H3PO4 solution. (b) What volume, in Liters, of a 1.25 M H3PO4 solution can be prepared by diluting 50 mL of a 4.5M H3..
compute the amount of heat needed to completely sublime 43.0 grams of solid dry ice at its sublimation temperature. the
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, Hfus = 6.01 kJ/m..
Seawater contains about 885ppm S. Assuming that this is in the form of SO42-, what weight of BaSO4 precipitate would be expected from 100mL of seawater sample
A solution made by dissolving 14.2 g of an unknown compound in 100.0 g of water has a freezing point of -0.771 °C. If the Kf for water is 1.86 °C/m
find the ph of the resulting solution when 20.00ml of a 0.1000m triethylamine ch3ch23n kb 5.2x10-4 solution is
chromium crystalizes forming body center cubic unit cell length 280 pm. What is the radius of chromium atom in pm
what is the molar mass of gas if 0.250 g of the gas occupies 215 mL at 61 8mmHg and 30. 0C
A gaseous mixture contains 407.0 Torr of H2(g) , 377.5 Torr of N2(g) , and 83.3 Torr of Ar(g) , calculate the mole fraction, X, of each of these gases.
time dependencies 20n2o4 undergoes a first-order reactionn2o4 g --gt 2 no2 g.the rate constant for this reaction is 3.0
How much heat is required to change 25.0 g of liquid Ethanol that is at a temperature of 158.7 K to a gas at 351.5 K
what mass of nacl is required to lower the freezing point of 1.75kg of water by 2.5 c? what mass of cacl2 would
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