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Explain how the standard deviation/standard error could be used to ensure quality and or consistency and provide an example of its application so I can see how it is done.
Problem- A patient is given 0.055mg of technertium-99 m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 1.9 x 10^-3 mg
A sample of gas in a balloon has an initial temperature of 41 degree celsius and a volume of 1770 L . If the temperature changes to 96 degrees celsius, and there is no change of pressure or amount of gas, what is the new volume,V2 ,of the gas
A student performs an extraction using water and methylene chloride. Which is the top layer and which is
Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the ^14C has decayed to 1/32.0 of the original amount. How long ago was this plant alive
A solution of potassium chromate is prepared at pH 7.72. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
How many milliliters of water vapor
the temperature of a lead fishing weight rises from 15 oc to 45 oc as it absorbs 22.5 kj of heat. what is the mass of
Explain what property of the sodium salt of methyl salicylate, as compared to the disodium salt of salicylic acid, made it possible to visually gauge the progress of this basic hydrolysis of methylsalicylate
A 300.0 mL salt water sample contains 0.308 mol NaCl. Calculate the concentration of NaCl in the sample.
Predict the products when cyclohexanol is heated in the presence of H+. Show both the organic product and the byproduct
A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+half-cell at 25 °C. The initial concentrations of Ni2+ and Zn2+are 1.80 M and 0.120 M , respectively. The volume of half-cells is the same. 1. What is the initial cell potential? ANSWER: ..
what is the molarity of acetic acid in vinegar when 19.9 mL of NaOH neutralized vinegar and the molarity of NaOH is 0.2175?
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