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An archeologist unearths a skeleton of a mastodon. Analysis shows the skeleton to a carbon-14 activity of 2 cmp (counts per minute per gram). If we know the skeleton had an initial carbon-14 activity of 16 cpm when the mastodon died and that the half-life of caron-14 is 5730 years. How long ago did the mastodon die?
Which of the following set of quantum numbers (ordered n, \ell, m_{\ell}, m_s) are possible for an electron in an atom
Use the van der Waals equation of state to calculate the pressure of 3.20 mol of Xe at 481 K in a 5.80-L vessel.
5000 joules of energy are added to 108 grams of silver ag at 20degc. what is the final temperature of the metal? the
Construct a simulated 1H NMR spectrum, including proton integrations, for CH3OC(CH2OCH3)3. Drag the appropriate splitting patterns to the approximate chemical shift positions;
how do you calculate the density of metals? could this method be used for determining the density of mercury as well?
Consider the following reaction: CO(g)+2H2(g)-->CH3OH(g) Kp=2.26*10^4 at 25 degrees C. Calculate deltaGrxn under each of the following conditions- At STP, at Equilibrium, and when PCH3OH=1.1 atm, and pCO=pH2=1.3*10^-2 atm.
The solvent used in the preparation of diphenylacetylene (2) is triethylene glycol. A) Write the structure of triethylene glycol; circle and label each of the functional groups in this molecule. B) What structural features account for the high boi..
A 100g iron ball (specific heat= 0.473 J/g degrees celcius) is heated to 125 degrees celcius and placed in a calorimeter holding 200g of water at 25.0 degrees celcius. What will be the highest temperature reached by the water?
For the following reaction 2SO3(g)>2SO2 (g)+O2(g), the equlibrium constant Kp is 1.32 at 627 C. What is the equlibrium constant at 627 for the reaction SO2(g)+1/2O2.SO3(g)
how many grams of Cu2S could be produced if 100.0g of copper is heated with 50.0g of sulfur? what is the amount of excess reactant?
what is the mass in grams of A) 6.21 mol of KBr B) 10.2 mmol of PbO C) 4.92 mol of MgSO4 d) 12.8 mmol of Fe(NH4)2(SO)4 6H2)
What evidence exist to support the theory that an atom contains a massive nucleus that is very small relative to the size of the whole atom
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