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The Hach chemical company makes a test kit based on the Gutzeit-Marsh reaction, that has a detection limit of 5 ppb for inorganic arsenic in a 100-mL sample of drinking water. I am trying to adapt this for the determination of inorganic arsenic in rice. Undergraduate researchers in my group have shown that all the inorganic arsenic in 10 g of rice can be extracted into 100 mL of dilute acid. What is the lowest concentration of arsenic in rice that I can detect with the test kit?
A molecule with a chiral center must be optically active whereas a molecule with two chiral centers may or may not be optically active. Explain and provide examples.
you take stoichiometric amounts of 2-heptene c7h14 and oxygen in a sealed 1.500 l flask and allow them to react. the
Catalysts are substances that increase the rate of reaction but can be recovered unchanged at the end of the reaction. Catalysts can be classified as either homogeneous or heterogeneous
if 105 of fluorine-18 is shipped at 800 a.m. how many milligrams of the radioisotope are still active if the sample
The convention of arbitrarily assigning a zero enthalpy value to all the most stable elements in the standards state and (usually) 298 K is a convenient way of dealing with the enthalpy changes of chemical processes.
Which properties are the same for both reactions and which are different? the number of atoms of each element, the state of the methane molecules, the enthalpy change of the reaction, the state of the carbon atoms.
its clay concentration and the CEC of the clay be able to estimate the draction of CEC due to organic matter in the sample
write the rate law for each elementary reaction in the mechanism. D) if the first step is slow and the second one is fast, what rate law do you expect to be observed for the overall reaction.
a cube made of Platinum has an edge length of 1.60 cm the density of pt is 21.45 g/cm^3 calculate the number of pt atoms in the cube
the system achieves thermoequilibrium at atmospheric pressure. Assume no heat loss to the surroundings. What is the final temperature of the combined metal sheets?
Explain how three features of the FastTrack Schedule 9's features will help you manage information systems projects. Be specific in relating the feature to the systems tasks you would want to achieve with it.
Question- By titration it is found that 80.1 mL of 0.114 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
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