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Explain how many Joules of nutritional energy are in a bag of chips whose label reads 245 Cal? If 1 lb of fat is stored by the body for each 14.6 X 103KJ of excess nutritional energy consumed, how many bags of chips contain enough nutritional energy to result in 1 lb of body fat?
A solution is exposed to air where the partial pressure of N2 is 0.80 atm, and the concentration of N2 in solution is 6.0x10-4 M. What would be the concentration of N2 in solution if the partial pressure is lowered to 0.40 atm
Calculate the pH of a mixture of .25M acetic acid and .1M sodium acetate. The pKa of acetic acid is 4.76.
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point
Calculate the work done (in joules) if the gas expands against a constant pressure of 2.1atm. Enter your answer in scientific notation.
A piece of iron with a mass of 350g at 300 C is added to 1.00kg of water at 20 C. what is the final temperature of the iron
use the concept mof electron configuration to explain why the number of valence electrons in metals tend to be less the number in most nonmetals.
A urine sample contains 46.5mgL-1 of ethanol. The density of ethanol is 0.79gcm-3. What is the concentration expressed as %v/v
Platinum crystallizes into a cubic lattice structure that has a total of four Pt atoms per unit cell. (a) What type of unit cell does platinum form. (b) What is the mass of a unit cell of platinum
Liquid NCl3 in a 2.5 L closed container is heated until it decomposes completely to gaseous products. The resulting mixture exerts a pressure
A certain reaction has an enthalpy of change in H = 54 kJ and an activation energy of Ea=81 kJ. What is the activation energy of the reverse reaction
Liquid helium at 4.20 K has a density of 0.147 g/mL. Suppose that a 1.50 L metal bottle at 110 K contains air at 3.0 atm pressure. If 50.0 mL of liquid helium are added to the bottle
Does that indicate the original alcohol is in that mixture? What is the source of 2-bromopentane?
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