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1. What is the molecular weight in pounds of: (you may round the atomic weights of the individual atoms to the nearest whole number - your answers will be very tiny numbers!)
a. Glucose (C6H12O6)
b. How many glucose molecules would you need to metabolize to lose one pound?
c. When you metabolize glucose about 13% of the glucose mass becomes water, and about 87% becomes carbon dioxide. If you lost 15 pounds working out at the gym, how many pounds did you exhale, and how many pounds were lost as sweat, urine, or vapor in your breath?
A fossil was analyzed and determined to have a carbon-14 level that is 42.0 that of living organisms. How old is the fossil
1. bleaches act on stains bya. removing electrons during the oxidation process.b. reducing the colored compound by
Wpump = 1500 kJ/h = 0.42 kW Qboil = 2.59 x 106 kJ/h = 718.7 kW Wturb = -227,300 kJ/h = -63.1 kW Qcond = -2.36 x 106 kJ/h = -656 kW What is the efficiency of the engine? How should we define it?
Calculate the freezing point of a solution of 60.0 g of NaCl (assume complete dissociation) dissolved in 500.0 g of water. Kf = 1.86 C/m and Kb = 0.512 C/m
The vapor pressure of pure propyl chloride is 347 torr at 25°C and that of pure propyl bromide is 133 torr at 25°C. Assume that the solution is an ideal solution.
Describe in detail how the addition of plant residues in soil with high C:N ratio may lead to N deficiency in soils.
Which solution will have the larger change in its freezing point: a 0.75 molal solution with water as the solvent or a 0.75 molal solution with naphthalene as the solvent. Calculate delta T for water and delta T napthalene
A buffer solution is prepared by dissolving 0.200 mol of NaH2PO4 and 0.100 mol of NaOH in enough water to make 1.00 L of solution. What is the pH of the H2PO4- / HPO42- buffer if the Ka2 = 6.2 * 10^-8 A) 7.71
A gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. What is the total pressure in mm Hg of the mixture?
prepare a standard of lidocaine in methanol with a final concentration of 1.00 mgml using the powder lidocainehcl. show
a stock solution of nacl is made taking 150.2g in enough water to make 200.0ml. a 10.00 ml sample of this stock
In one form of the Fullerene C60 molecules C60 form a cubic - closest packed array of spheres with unit cell edge length of 1410pm. Explain what is the density of crystalline C60 in g/cm3
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