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The performance of a new mass spectrometer is being evaluated for the analysis of uranium in well water. Replicate measurements of a blank provided a mean and standard deviation of 0.104 mV and 0.040 mV, respectively. The slope of the linear regression line was 2.78 (mV/nM). What are the signal limit of detection and the concentration detection limit, respectively (to 2 s.f. each)?
Signal detection limit?
Concentration detection limit?
If 21.0 mL of silver nitrate solution reacts with excess potassium chloride solution to yield 0.882 g of precipitate, what is the molarity of silver ion in the original solution
An optically active compound A, C6H10O2, when dissolved in NaOH solution, consumed one equivalent of base. On acidification, compound A was slowly regenerated. Treatment of A with LiAlH4 in ether followed by protonolysis gave an optically inactive..
When determining the effective nuclear charge for a 1s electron, Slater's rules dictate that the other 1s electron must have a value of 0.30 not 0.35. Why?
How much heat (in J) is evolved or absorbed when a 36.9 g sample of water (specific heat = 4.18 J/(g K)) cools from 87.7oC to 79.2oC
Since you need pressure based constant use ideal gas equation (PV=nRT) to convert moles of gas into pressure with units of atmospheres. R=0.0821 L atm/mol K
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
You have 50 mL of 0.010 fully protonated histidine. how many milimoles of base must be added to bring histidine solution to pH equivalent to the pI of histidine.
In the reaction 2A---->X+Y the initial concentration are all 0.600M. If the equilibrium constant is 1200000 what are the equilibrium concentrations
This solution was back-titrated with a .0440 M Ga3+ solution until all the EDTA reacted requiring 14.0 ml of the Ga3+ solution. What was the original concentration of the V3+ solution
Monochloroacetic acid (HC2H2ClO2) is a skin irritant that is used in "chemical peels" intended to remove the top layer of dead skin from the face and ultimately improve the complexion.
Silicon has been doped with 5 x 10^22 m^-3 of boron atoms. Calculate the conductivity of silicon at (a) room temperature (32 C) (b) at (125 C)
Write the net ionic equations that account for the pH values of: 0.1M NH4Cl (pH 6.25), 0.1M NaC2H3O2 (pH 8.24)
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