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Determine the numbers of milliliters of 0.202 M NaOH should be added to the 25.0mL of 0.0233 M salicylic acid (2-hydrobenzoic acid) to adjust the pH to 3.50 M? Where the pKa's for the Salicylic acid
What percent concentration is prepared if 6g of NaCl is dissolved in the1L of solution. What molar concentration is this when a 0.9% solution of NaCl is considered isotonic to the mammalian cell
A ground-state hydrogen atom absorbs a photon of wavelength 97.35 nm, causing the electron to jump to a higher energy level. Finally a second photon is emitted when the electron returns from the int
Demonstrate that the probability will be complex which is unphysical and therefore rejected. Suppose, by mistake, the phase is different for two wave functions.
Determine the percent yield of a reaction in which 246 g phosphorus trichloride reacts with excess water to produce the 135 g HCl and the aqueous phosphorus acid (H3PO3)?
Determine the temperature increase and the final pressure of Helium if a mole is compressed adiabatically and reversibly from the 44.8L at 0 to 22.4L
Determine the work when the gas is allowed to expand reversibly to 1 bar pressure. A tank contains 20L of compressed Nitrogen at 10bar and 25(degree C).
Determine the minimum temperature at which magnetite can be reduced to iron by graphite: Fe3O4(s) + 2C(s) -> 2CO2(g) +3Fe(s); deltaSr° = +351.44 J/K-mol;.
Determine the numbers of grams of NaCl are needed to precipitate most of the Ag+ ions from the 2.50x102 mL of 0.0113M AgNO3 solution? Write down the net ionic equation for
Explain what will be the final volume reading of the water in the cylinder when the density of lead metal is 11.35g/cm3 and the 12.49 g of lead metal is added to a 10-ml graduated cylinder con
Determine the numbers of sliver atoms are present in a vapor volume of 486ml when the Ag (l)and Ag(g) are in equilibrium at the 1360 degree C? Where the Vapor pressure of sliver at the 1360degree C
The fuel is found to have a density of 0.775g/mL. An automobile modified to use a mixture of 85% methanol and 15.0%gasoline (by mass) consumes 5.5L of fuel for every 100 km.
What volume of water should this sample displace when the one student determines that 7.43g sample of a solid metal displaces 2.80ml of water in a graduated cylinder and the another student
Suppose the percent abundance of the lighter isotope were 62%. Chlorine has two stable isotopes of mass 34.97 u and 36.97 u. Explain what would be the atomic mass of Cl when the actual abundan
Determine the minimum power to continuously separate an equimolar mixture of the argon and methane at the 100 C and 0.3 MPa to the pure components at the 300K and 0.1MPa? If any heat is involved in
Potassium bromide (10.5g), also at 24.2 degree C, is added to the water, and after the KBr dissolves the final temperature is21.1 degree C. A coffee-cup calorimeter initially contains 125g water at
A 29.19 mL sample of the HCl solution required 21.18 mL of NaOH solution for complete reaction. What is the molarity of the HCl solution? A 0.05500 M solution of NaOH was used to titrate a solution
Calculate the time required for the reactant concentration to drop to (a) 25 percent of the initial value, (b) 10 percent of the initial life. The half-life of a first-order decomposition rea
Determine the numbers of N atoms are there in one mole of N2? One mole of N2 contains how many N2molecules? One mole of iron (III) sulfate, Fe2 (SO4)3, contains how many moles of SO42-
Explain what temperature will it rise if the aluminum is oxidized by the air? 1 wt% aluminum is dispersed in aluminum oxide. It is initially at 298K and the entire mass maybe assumed to rise a
Explain how you would use infrared spectroscopy to distinguish among the two compounds when the cyclohexene and 2-hexyne both have the molecular formula C6H10
Determine an unknown with the molecular formula C4H6. Determine the numbers of degrees of un-saturation are present?
What is the diameter of the cylinder when a cylindrical rod produced from silicon is 14.1 cm in length and has a mass of 2.31 kg and which is having the density of silicon 2.33g/cm^3.
Determine the numbers of grams of oxygen are needed to burn 100 g of propane? What volume of oxygen would be required to burn 100 g of propane at standard temperature and pressure (25 C and 1 atm).
A mix of 75% air and 25% NH3 gas is passed upward thru a vertical scrubbing tower, to the top of which water is pumped. Scrubbed gas which is having the 0.5% NH3 leaves the top of the tower, and an