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an archaeological sample contains 0.743g of lead -206 and 2.145g of uranium - 238. Assume that all the lead now present in the rock came from the radioactive decay of the uranium and that no appreciable amounts of other radioactive nuclides are present in the sample. what is the age of the sample
An 0.758 mol sample of neon gas at a temperature of 18.0 oC is found to occupy a volume of 24.0 liters. The pressure of this gas sample is. answer in mm Hg please.
For each element listed below, determine the charge of the ion that is most likely to be formed and the identity of the noble gas whose electron configuration is acheived.
2.58g of a gas has a volume of 3.97L at 745mmHg and 21 degrees celcius. What is the molecular weight of the gas?
What is the specific heat of a substance that it takes 192 Joules to raise the temperature of 45 grams by 6 degrees Celsius
A 4.10 g nugget of pure gold absorbed 274 J of heat. What was the final temperature of the gold if the initial temperature was 27.0°C? The specific heat of gold is 0.129 J/(g·°C).
Cerium is often used as a reducing agent. Although it is expensive, it has a high stabile and constant value of E^ o over a PH range from 0 to 7.
the growth rate drops 6 orders of magnitude and effectively reduces the crystallization rate to zero. Calculate the self-diffusion of this alloy system.
It takes 50% of NaOH to prepare .6 Normality of NaOH. How much of 50% of NaOH to prepare 50 Liters of solution
Five kg of water initially a saturated vapor at 100kPa are cooled to saturated liquid while the pressure is maintained constant. Sketch the process on a p-v diagram
What are the concentrations of HSO4-, SO42-, and H+ in a 0.14 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
a buffer is created by mixing 26 mL of 3.3M sodium formate and 16 mL of 3 M formic acid. What is the capacity of the buffer if 0.2 M NaOH is added?
Your stock solutions are 20% glucose, 1M tris and 0.5M EDTA. The diluent is distilled water. Determine how much of each you will add to make the desired buffer.
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