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Calculate the vapor pressure of water above a solution prepared by dissolving 35.0 g of glycerin (C3H8O3) in 140 g of water at 343 K. (The vapor pressure of water at 343 K is 233.7 torr)
Draw N-ethyl-3-methylpentanamide. Draw your structural formula with all necessary hydrogen atoms.
ammonia, NH3, reacts with hypochlorite ion, OCl-, to produce hydrazine, N2H4. How many moles of hydrazine are produced from 5.85 mol of ammonia if the reaction has a 78.2% yield
When 10.0 g KOH is dissolved in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 25.18°C to 47.53°C. What is the enthalpy change, in kJ/g of KOH dissolved in the water? Assume that the solution has a specific heat capacity ..
Suppose the current flowing from a battery is used to electroplate an object with silver. Calculate the mass (in grams) of silver the would be deposited by a battery that delivers 1.25 A/hr of charge.
Describe a situation where a substance changed between the solid and liquid states or between liquid and gas states? Can you describe an example of when a substance changed between the gas and solid states? Let's see how many different examples we..
What are the three major buffer systems of the body and what are the chemical equations
N2 is used industerial to produced Nitric acid, but contributes to acid rain and photo chemical smog. What value of nitrogen is formed at 742 torr and 28.7dgree by reacting 2.78cm^3 of cuppor 8.95gm/cm^3 .with 246 ml of nitric acid and 68% by mass
Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving .8 mol of NaOH in .50 L of 1.0 M H3PO4
Suppose that the microwave radiation has a wavelength of 10.8 . How many photons are required to heat 205 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
What is the stoichiometric relationship between IO3- and I2? b. What is the stoichiometric relationship between I2 and S2O3 2-? c.
for na and mg ions compare the ratios of the number of ions in the 3p excited state to the number in the ground state
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
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