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What is the concentration of vitamin C in the juice in mg vitamin C/100 mL of juice (mg/ 100 mL)?
What is the mechanism of the reaction between benzophenone with sodium borohydride and indicate what bonds are broken/formed and draw arrows to show what happens to the electrons as bonds break and
The density of pure silver is 10.5 g/cm3 at 20°C. If 6.17 g of pure silver pellets is added to a graduated cylinder containing 14.1 mL of water, to what volume level will the water in the cylind
A 0.456 gram sample of an unknown mono protic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL o
One compound of mercury with a formula mass of 519 g mol-1 contains 77.26%Hg, 9.25%C, and 1.17%H (with the balance beingO). Calculate the empirical and molecular formulas.
When 79.272 g of nitrogen gas is reacted with 79.272 g of hydrogen gas, how many grams of ammonia are formed?
Assume you dissolve .297 g of the weak acid benzoic acid in enough water to make 105 mL of solution and then titrate the solution with .141 M NaOH. What are the concentrations of Na+ at the equival
A 0.1946 g piece of magnesium metal is burned in a constant volume calorimeter that has a heat capacity of 1349 J/°C. The calorimeter contains 500 g of water and the temperature rise is 1.40&de
When sodium reacts with chlorine, 411 kj/mol is released. Calculate the amount of heat released if 1.37 mol of sodium form.
What is the structure os glycylserine and serylglycine?
An experiment requires 43.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What
What is the enthalpy of vaporization of acetone (CH3COCH3) at its normal boiling point of 56.2?C? The entropy of vaporization
Briefly discuss interpretations of your observations and results. Discuss how your observations illustrated LeChatelier's principle.
What is the molarity of ions in a solution formed by dissolving 7.40 of the mixture in enough water to form 600.0 of solution? A mixture contains 76.5% NaCl , 6.5% MgCl2 by mass.
Calculate the equilibrium constant (Keq) for the reaction of equimolar amounts of acetophenone and sodium hydroxide to generate the enolate. The pKa values of acetophenone and water are 19.0 and 15
If a sample containing 2.11 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
What features would you expect to be different when comparing the IR spectra of serine and tyrosine? Provide at least two features that you would expect to be the same. Explain your answer in terms
If the molar enthalpy of water is 6.009 kJ/mol, how much energy is needed for 4.5 moles of ice to melt at STP?
What volume in milliliters of a 0.141 solution is required to reach the endpoint in the complete titration of a 16.0 sample of 0.148 ?
A solution is 0.010 M in both Br- and SO42-. A 0.250 M solution of lead(II) nitrate (Pb(NO3)2) is slowly added to it. a) which anion will precipitate first? b) what is the concentration in the solu
Assuming that all the FeS2 reacts, how many grams of SO3 are produced when 20.0 g of the FeS2 reacts with 16.0 g of O2?
How many joules of heat are needed to completely vaporize 24.40 grams of water at its boiling point?
comes to equilibrium, it is observed that the concentration of NH3 is 2.39 moles/L. What is the numerical value of the equilibrium constant Kc?
If the total blood volume of an individual is 5 liters, how many grams of total blood cholesterol does the individual contain?
Radioactive isotope X has been found in rock units S and Q. Isotope X breaks down into isotope Z with a half life of 250 million years. Samples from unit Q indicate 25% parent isotope X and 75% daug