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Explain what is the wavelength of light emitted when an excited electron in hydrogen atom falls from the n=5 level to n=2? use nanometers
what determines the order in which the component elements of binary compounds are written?
What is the osmolarity of the following solutions. Express answer in two signint figures. 1. 0.35 M KBr 2. 0.15 M glucose +0.05 M K2SO4
The following reaction has achieved equilibrium. Predict the effect on the formation of phosphorous pentachloride (increase, decrease or no effect) for the stated changes to the system
The specific heat of liquid ethanol is 2.3 J/g-K. How much heat is required to convert 28.0 g of ethanol at 28 C to the vapor phase at 78 C
Rate Law for Proposed Mechanism, Consider the reaction 2NO(g) + O2 ---> 2NO2 (g). The following mechanism has been proposed to explain the experimental rate law
phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphorus contain the same number of molecules as 6.4 g of sulfur.
If you measure the pH and find it to be 11.24, how many grams of triethylmine were used to make the solution?
translate the following word equations into unbalanced chemical equations and explain how the equations represent what
Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a 25.00 mL aliquot. Titration of the lead required 26.68 mL of the EDTA solution. Determine the com..
If 23.13 g of Al at 337.0oC is added to 157.9 g of water at 25.4oC, what is the final temperature (oC) of the mixture?
Describe how you will prepare the 1.00 x 10-3 M phosphate solution using the phosphate stock solution provided (1.00 x 10-1 M) to create a 200 mL of 1.00 x 10-3 M phosphate solution.
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 2.20 mol of gas \rm D measured at 251 ^\circ \rm C in a 1.75-\rm L container as..
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