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Problem- The half life of iodine 131, also called radio iodine is 8.02 days. How much iodine-131 will remain after two half lives in a sample that initially contains 5.0g of the nuclei de? Please give detailed explanation.
You must show your work in an efficient manner so I can understand it in clearly
find the net ionic equation for BaCl2(aq) + NaOH(aq) --------->Ba(OH)2(?) +NaCl(aq) is the Ba(OH)2 a solid or aqueous in water? please first show the ionic equation then cancel out spectator ions just for clarity.
Write ground-state electron configurations for these ions, which play important roles in biochemical processes in our bodies. (Use a noble gas core abbreviation) Na^+, Mg^2+ Cl^- K^+
anbsp nitrous acid hno2 aq has a dissociation constant ofka4.5x10-4.b. write the equilibrium constant expression for
When 2.5000g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0C, the temperature of the solution went up to 37.1C.
How many grams of KHP are needed to exactly neutralize 27.4 mL of a 0.235 M potassium hydroxide solution ?
How many kilojoules of thermal energy are released by the reaction of 3.41 g Al with excess oxygen? 2Al(s) + 3/2O2(g) --> Al2O3(s) delta H rnx = -1675.7 kJ
A 21.70mL volume of 0.0940 M NaOH is required to reach the phenolphthalein endpoint in the titration of a 3.06g sample of vinegar. calculate the number of moles of acetic acid in the vinegar sample.
The following data were obtained for the decomposition of N2O5 in the presence of 1 atm. N2 at 298 K.time (hr.) P(N2O5) atm P(N2O5) P(N2O5) P(N2O5) (for P(N2)=5 P(N2O5) (atm))
Draw resonance contributors for the following: indicate major and minor contributors to hybrid
The wavelength of a color of yellow light is 599nm. What is the energy of this wavelength of light in kJ
Benzoyl peroxide, the substance most widely used against acne, has a half-life of 9.8 103 days when refrigerated. How long will it take to lose 7% of it potency (93% remaining)
Question- Sort the isotopes: thorium-232, sodium-26, flourine-17, bromine-90, iridium-164 into their categories: Alpha decay, beta decay, 0/1e emission, or 0/-1e capture
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