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Two students scouring an archaeological site found what appeared to be fossil remains. The specimen was found to have a ratio of 14C/12C 0.795 times that found in current living plants. What would be the estimated age of the fossil remains? The half-life for carbon -14 is 5720 years.
A mixture of 1.374 g of H2 and 70.31 g of Br2 is heated in a 2.00-L flask at 700 K. The following equilibrium is established: H2(g) + Br2(g) ? 2HBr(g) At equilibrium the vessel is found to contain 0.566 g of H2.What is Kp for this reaction?
Calculate the concentrations of all species in a 1.01 M Na2SO3 (sodium sulfite) solution
Compound A gives 79.37% C and 8.88% H by elemental analysis as well as gives a molecular ion peak of 136 on low resolution mass spec. Explain what is the molecular formula
Org chemistry lab Q lab 2: why does the water solubility of the acidic compound change when going from the aqueous base to the aqueous acid.?? pls write the eq'n to illustrate this change
Calculate ΔG for the reaction if the partial pressures of the initial mixture are PPCl5 = 0.0029 atm, PPCl3 = 0.27 atm, and PCl2 = 0.40 atm PCl5(g)--> PCl3(g) + Cl2(g)
When numbers are very small or very large, it is convenient to either express the value in scientific notation and/or by using a prefix with the unit.
Calculate the mass of a single particle of Na2CO3 and the number of particles of Na2CO3 in the mixture. Do the same for K2CO3.
Question- Another compound B composed only of carbon, hydrogen and oxygen, also shows a molecular ion at m/z=112 amu. Write a plausible molecular formula for compound B, assuming it has three double bonds and no rings.
An empty vial has a mass of 67.77 g. If the vial has a mass of 244.56 g when completely filled with liquid carbon terachloride (d = 1.59 g/cm3), what is the volume of the vial?
A 25 ml sample of a copper (ii) solution needs 35.45 ml of 0.2000 M Na2SO3 solution to reach the end point. Compute the molar concentration of Cu2+ in the sample
Problem- The vapor pressure of toluene is 8 kPa at 40.3 C and 2.67 kPa at 18.4 C. Calculate (a) the heat of vaporization and (b) the vapor pressure at 25 C.
Equation that represents the reaction of 2% ethanolic PBP solution with 4-methylcyclohexene
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