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A certain substance has a heat of vaporization of 55.45 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?
How many grams of liquid methanol (CH3OH) are needed to heat 425 mL of water from 18 oC to 43 oC by combustion with oxygen.
Compute the % sodium carbonate (MM = 105.99 g/mol) in this sample.
A patient needs to take 625 of ibuprofen twice daily. The pills in the bottle are each 250. . How many pills does the patient need to take each time she wants the 625 dosage? Assume that these pills are scored and can be cut in half if necessary.
A balloon filled with helium gas at 20C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196C, raising the pressure to 5.20 atm.
How many moles of NaOH are needed to raise the pH of a 4.50 L tank containing 0.00100 M HCl solution to 3.50?
What would be the temperature change of 450ml of water that surrounds this ice cube assuming all the heat was transfered form the surrounding water.
If 3.00 g of (NH4)2SO4 is dissolved in enough water to form 200. mL of solution, what is the molarity of the solution?
Calculate the 1) mls of 15M Acetic acid 2) the grams of sodium acetate 3) and the mls of water required to make a 500mM acetate buffer at pH 4.85
The first-order decomposition of N2O5 proceeds as follows: 2 N2O5 (g) → 4 NO2 (g) + O2
calculate the pH a solution that contains 0.800% C5H5N by mass and 0.815% C5H5NHCl by mass
calculate the amount of energy in kilojoules needed to change 153g of water ice at -10 C to steam at 125 C.
In an acid-base titration experiment, 50.00 mL of a 0.0500 M solution of acetic acid (ka=1.75 x 10^-5) was titrated with a 0.0500 M solution of NaOH at 25 degree C
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