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what mass in grams of a 0.5 m solution of sodium acetate in water would you use to obtain 0.150 mol of sodium acetate
Calculate the energy of a photon emitted an electron in a hydrogen atom undergoes a transition from n=3 to n=1
Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is CH2O.
consider a hydrogen atom in the ground state. what is the energy of its electron? Now consider an excited- state hydrogen atom. what is the energy of the electron in the n=2 level
To resolve an object in an electron microscope the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein
The blood buffering system is aided by the enzyme carbonic anhydrase, which interconverts carbon dioxide and water to bicarbonate and H
What is the empirical formula of a substance that contains 0.183 mol of carbon, 0.367 mol of hydrogen, and 0.183 mol of oxygen
A student takes a mixture of sugar (C6H12O6), diamond powder (C) and BaCO3, separates the mixtures and recovers 1.75g sugar, 0.86g diamond powder and 2.29g BaCO3(s). Student % recovery was 96.46%, l
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295k and volume of hydrogen gas collected was 35.6 mL. T
A certain rifle bullet has a mass of 9.81 g. Calculate the de Broglie wavelength of the bullet traveling at 1433 miles per hour.
Given the following peptide: MPFITCYRVE What is the net charge on this peptide at pH 3 and pH 11. Use the pK values for the individual amino acids in Table 4.1. Estimate the pI (isoelectric point) f
when a metal was exposed to light at a frequency of 4.49 x 10^15 s^-1, electrons were emitted with a kinetic energy of 4.80 x 10^-19 J. What is the maximum number of electrons that could be ejected
Tell the number of hydrogens bonded to each carbon atom in (a) the anti-influenza agent oseltamivir, marketed as tamiflu, and (b) the platelet aggregation inhibitor clopidogrel, marketed as plavix.
An unknown compound contains only carbon, hydrogen, and oxygen.Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water.
The first ionization energy, E, of a lithium atom is 0.860 aJ. What is the wavelength of light, in nm, that is just sufficient to ionize a lithium atom
Draw a line-bond structure for a compound with a molecular formula of C5H14 and one carbon with only one hydrogen attached to it.
the human eye is able to detect as little as 2.35 x 10 ^-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human eye.
20.00 ml of 0.100F Pb(No3)2 (FW 331.2) are mixed with 15.00 ml of 0.125 F Nal (FW 149.9). Lead (II) and iodide form an insoluble salt pbl2 (FW 461.0) Calculate the concentration of each of the remai
Why does the processing of a crystalline material like nylon require more critical thermal control as opposed to an amorphous material like ABS
Microwave ovens emit microwave energy with a wavelength of 12.2 cm. What is the energy of exactly one photon of this microwave radiation
A particular element exists in two stable isotopic forms. One isotope has a mass of 34.9689 amu ( 75.77% abundance). The other isotope has a mass of 36.9659 amu. Calculate the average mass of the el
what bond angles do you expect for each of the following, and what kind of hybridization do you expect for the central atom in each
how many grams of calcium chloride will be Produced when 26 g of calcium carbonate are combined with 13.0 g of hydrochloric acid. Which reactant is in excess and how many grams of this reactant will
Remembering Markovnkov's Rule, draw the structure of the carbocation formed during the reaction of 2-methylpropene
In the first step of the ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water. What is the maximum mass of H2O that can be produced by combining 80.9g of each reacta