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Problem- The first excited energy level of the helium atom is 3.13 10^-13 J above the ground level. Estimate the temperature at which the electronic motion will begin to make a significant contribution to the heat capacity. That is, at what temperature will the ratio of the population of the 1st excited state to the ground state be 5%?
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Calculate the volume of H2 (in mL) required to hydrogenate 27.2 g of trans-carveol at STP
Rank from highest to lowest boiling point. items can be marked as equivalent. F2, NaCl, HCl, HF, Rank in Correct Order from Highest to lowest Boiling Point? Also which one is the highest boiling point
How many formula units make up 26.2 g of magnesium chloride (MgCl_2)?
Which of the following statements about heat is false. A) If heat flows into a system, the extra energy of the system appears in the form of internal energy. B) A hot object possesses more heat than a cold object.
From the subsequent partial valence-level orbital diagrams, State the condensed electron configurations and the respective group numbers. (a) Electron configuration
Blood alcohol content (BAC) is often reported in weight-volume percent (w/v%). For example, a BAC of 0.08% corresponds to 0.08 g CH3CH2OH per 100 mL of blood. In Ontario, and the rest of Canada, the maximum legal BAC for fully licensed drivers is ..
Following a terrorist release of Cesium-137 (half-life of 30 years) in downtown, clean up efforts were successful in removing all but 100 curies. How long will it take for the contamination to decay to about 5 curies?
Chlorine gas can be formed commercially by passing an electric current through a concentrated solution of sodium chloride Brine. The unbalanced equation is NaCl(aq)+H2O(l)=NaOH(aq) + Cl2(g)+H2(g). Explain if the brine contains 430 g of NaCl how mu..
An empty graduated cylinder weighs 82.450 g. Whe filled to 50.0 mL with an unknown liquid it weighs 110.810 g. What is the density of the unknown liquid?
if the reaction of moco6 with mesitylene was conducted in the presence of air what would likely be the decomposition
what amount of solid sodium acetate is needed to prepare a buffer at ph 5.2 from 500 ml of 0.10 m acetic acid? the pka
A mixture of CaCO3 and CaO weighing 0.693 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.436 g. Assuming all the CaCO3 broke down to CaO and CO2, calculate the mass percent of CaCO3 in the original mixture.
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