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A particular radioactive isotope has a half-life of 20.8 days. If you have 32.5 mg of the isotope at the beginning of the week, how many milligrams would you have 40 days later?
a. finance is a very challenging and rewarding field. it is exciting area because financial managers are given the
C.A. Yates was given a 50.0mL sample of the weak acid. The known concentration of the weak acid is .25M. After preparing a buret he delivers 25.0mL of the weak acid into a 100mL Erlenmyer flask. He then titrated this solution using a standardized ..
What is the final pressure in the container if 705 mL of helium gas at 205 mm Hg is compressed to 255 mL?
Write a detailed mechanism for this reaction that accounts for the net retention of detailed mechanism for this reaction that accounts for the net retention of configuration when Ag+ and a low concentration of hydroxide are used.
The decomposition of N2O5 in CCL4 is a first order reaction. If 2.56 mg of N2O5 is present initially and 2.50 mg is present after 4.26 minutes at 55 degrees Celsius what is the value of the rate constant K?
If He(g) has an average kinetic energy of 4610 J/mol under certain conditions, what is the root mean square speed
1. nitrogen and oxygen gases react to form dinitrogen trioxide gas.nbsp2 n2g 3 o2g 2 n2o3gat a certain temperature and
A solution of I2 was standardized with ascorbic acid. Using a 0.1000-g sample of pure ascorbic acid, 23.52 mL of I2 were required to reach the starch end point.
The NaOH Solution with a concentration of .188M is used to titrate a diprotic acid of unknown concentration. 25.00 mL of the acid solution requires 26.54 mL of NaOH solution. What is the concentration of the acid solution
A solution is prepared by dissolving 21.9 NaOH in 116.0 water. The NaOH solution has a density of 1.15g/mL. What is the % mm concentration of the NaOh solution What is the molarity (M) of the solution. What is the total volume (mL) of the solution
Compound A has a parent peak of M+ = 95 m/z in its mass spectrum and shows a medium intensity sharp infrared absorption band at 2280 cm. The HNMR of compound A shows 3 signals in a 4:4:1 ratio.
What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits
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