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Four balloons, each with a mass of 10.0 g, are inflated to a volume of 20.0L, each with a different gas: helium, neon, carbon monoxide or nitrogen monoxide. If the density of air at 25 degrees C and 1.00 atm is 0.00117 g/mL, will any of the baloons float in this air?
How much energy (in calories) is needed to heat 8.0 cm3 of fat from room temperature (25 c ) to its melting point (35 c )?
If the entropy of a collection of a molecules in 50,000 boxes is 3.73 x 10^-20 J/K, how many molecules are there
Proper equilibrium expression for the following reaction. 6CO2(g) + 6H2O(l) -> C6H12O6(s) + 6O2(g)
Determine the Ka of a 0.1M solution of acetic acid in which the hydronium ion concentration is 1.35 x 10^-3 M
Calculate the pH of a 1.3x10^-7 M solution of benzoic acid at 25°C. (The pKa of benzoic acid is 4.19 at 25°C. You may have to take into account the autoionization of water).
Calculate the molarity and mole fraction of acetone in a 1.25 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add. molarity ..
15.0 g of steam at 373 K is added to 250.0 g of H2O (l) at 298 K at constant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate ?S for the process.
Determine the energy in joules of a mole of photons coupled with red light of wavelength
Determine the maximum number of electrons that can be found in each of the following subshells.
how many grams of vinegar are required to react completely with 25.0g of baking soda.
Determine the volume of oxygen gas required to completely combust 3.5 mol of propane in a bbq at standard pressure and 28.0C
A solution consisting of 100 mL of the weak base 1.0 M NH3 is titrated with 1.0 M HCl. Which of the following is false. At the equivalence point, the solution is acidic.
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