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The pyrene excimer emission spectrum at a (higher/lower/same) wavelength than (as) the excited pyrene fluorescence emission spectrum. Explain.
One weighs 32.78 grams of NaOH and dissolves it in water (with stirring) to the mark in a 1500 mL volumetric flask. What is the molarity of this solution
For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased.
What volume (L) of H2 at 745 torr and 20.oC can be prepared from 4.8 g of water? (Atomic weights: Fe = 55.85, O = 16.00, H = 1.008; 1 atm = 760 torr).
Give the symbol of the element in the fifth period of the periodic table with five valence electrons, Give the symbol of the element in the fourth period of the periodic table with four 4p electrons
A 150.0-g sample of a metal at 75.0°C is added to 150.0 g of H2O at 15.0°C. The temperature of the water rises to 17.5°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the me..
Determine the barometric pressure of water If a mercury (Hg)barometer reads 755 mmHg,?Express your answer in cm?
Chemistry - Other explained in this solution, If world energy consumption continues to rise at the present rate of 2.4%, how long will it take to double (expressed in years)?
The mass of the water in the inner bath is 1.40×103g . The temperature of the calorimeter and its contents rises 2.83K as a result of this reaction. Calculate the calorimeter constant.
If your front lawn is 15.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour?
An oxygen tank kept at 20.0?C contains 28.0 moles of oxygen and the gauge reads 31.0 atm. After two weeks, the gauge reads 20.7 atm. How much oxygen was used during the two-week period?
Determine the structures of the compounds that would give the products
An aqueous solution is 33.0% by mass methylamine (CH3NH2) and has a density of 0.85 g·cm-3. a) If 48.7 mL of this solution is diluted to 1009.0 mL, what is the pH of the resulting solution
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