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Lightning from thunderstorms strike the Earth 100 times each second. 2400 deaths have been caused by lightning strikes over the past 25 years. How many strikes occur before a death occurs? Please explain?
The change in the Gibbs energy of a certain constant-pressure process as a function of temperature was found to fit the expression ?G (J K-1)=-73.1 J +42.8T. Calculate the value of S for the process.
account for each of the following properties of solids: the definite volume, the relatively high density of solids, the extremely low rate of diffusion.
draw a lewis diagram for ch3och2ch3. use your diagram to answer the following questions. best ans 10 points?the number
An IR spectrum for a sample of this solvent is found to show no appreciable absorbance in the region of 1700 cm-1. Of the given possibilities, what is the most likely identity for this paint solvent
Xanthine is a biological precursor of uric acid. What can you say about the molar absorptivity of xanthine if absorbance measurements of 250 μM, 300 μM, and 350 μM buffered aqueous solutions
Calculate the osmostic pressure of a 0.0120 M solution of NaCl in water at 0 degrees Celsius. Remember that NaCl is an electrolyte and assume it dissociates 100% in water.
a) write out the acid dissociation reaction for hydrochloric acid. b) calculate the pH of a solution of 5.0 x 10^-4 M HCl. c) write out the acid dissociation reaction for sodium hydroxide. d) calculate the pH of a solution of 7.0 x 10^-5 M NaOH.
A 0.221 g sample of sodium carbonate was titrated to a pale yellow endpoint with HCl. What is the concentration of HCl
A first order reaction has a half life of 26.4 sec. How long will it take for the concentration of the reactant to fall to 1/8 of its original value
What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear?
Consider the reaction Cu2S + O2 → 2Cu + SO2. If 55.0 grams of Cu2S is heated in excess O2, what is the mass of Cu that can be produced?
How much energy is released from the complete combustion of 63.0 g of sulfur in this equation:
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