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Compute the wt% Ag in ideal proustite (Ag3AsS3). What is the maximum quantity of silver (in troy ounces) that can be extracted from a ton of ore containing 90wt% quartz and 10wt% ideal proustite? 1 oz. troy=31.10323 g; 1 short ton=2000 lb=29,166.67 oz. troy
A 23.7-g sample of ethylene glycol, a car radiator coolant, loses 906 J of heat. What was the initial temperature of the ethylene glycol if the final temperature is 32.5 degrees Celsius (c of ethylene glycol=2.42 J/g*K)
100.0 mL of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide. An appropriate indicator is used. Ka for acetic acid is 1.7 x 10^-5. AFTER 25.0 mL of NaOH is added, what is the pH in the flask at the following p..
a) Write the balance equation for the reaction. b) How many moles of O2 are needed to completly react with 4.0 mol of C2H6O? c) If a car produces 88 g of CO2, how many grams of O2 are used up in the reation
If the sun is a distance of 1.5 x 108 km from Earth, how many minutes does it take sunlight to reach earth if light travels at 186,000 miles each second
A 3.77g sample of oxalic acid (H2C2O4x2H2O) was dissolved in enough water to make 1000 mL of solution. Then 17.15mL of this oxalic acid solution was titrated to the end point with 22.05mL of an unknown sodium hydroxide soloution.
Lysozyme is an enzyme that cleaves bacterial cell walls. A sample of the enzyme has a molar mass of approximately 14,000. g/mol. If a quantity of 0.100g of the enzyme is dissolved in 150g of water at 25C, calculate the a)vapor pressure, b)freezing..
If the binding energy of an electron in a hydrogen atom is 6.41?10^-19 J, what wavelength of photon is required to liberate it from the atom? Planck's constant = 6.626 ? 10^-34 J×s; c = 3.00?10^8 m/s
what is the purpose of using acetic anhydride in an experiment reacting with salicylic acid to produce acetylsalicylic
If a random sample of this element collected from the tail of a comet has an weighted average atomic mass of 10.788 amu, what is the percent abundance of the lower-mass isotope?
What is the heat of vaporization of a if 215mol of the liquid required 2040J of energy to vaporize at its boiling point
The Ksp of AgCl at 25oC is 1.0 x 10^-10. Calculate the concentrations fo Ag+ and Cl- in a saturated solution of AgCl, and the molar solubility of AgCl.
nbspthe electronic configuration of methyl 4-methoxycinnamate might be established very well in the cyclic intermediate
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