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What concentration of the barium ion, Ba^2+, must be exceeded to precipitate BaF2 from a solution that is 1.00*10^-2 M in the fluoride ion, F^- ? Ksp for barium fluoride is 2.45×10^-5.
First lab experiment - zinc and copper aqueous solutions were tested in a microscale cell well where the voltage reading was 1.04V. Solutions were each at about 5mL.
Suppose that the microwave radiation has a wavelength of 11.2cm . How many photons are required to heat 295mL of coffee from 25.0C to 62.0C
when companies sell compressed gas in steel cylinders they usually quote the contents as volume of gas at 1 atm
For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
Blood alcohol content (BAC) is often reported in weight-volume percent (w/v%). For example, a BAC of 0.08% corresponds to 0.08 g CH3CH2OH per 100 mL of blood. In Ontario, and the rest of Canada, the maximum legal BAC for fully licensed drivers is ..
An aqueous solution of cobalt and nickel ions was examined by multicomponent analysis using a 1.00 cm cell and two different wavelengths (denoted by subscripts 1 and 2) selected based on the absorption spectra of the two ions when complexed
Suppose you had standard .1000 M NaOH ,an indicator, such as phenolphthalein, an analytical balance, and a micro-buret available. Explain how you could determine
The balanced chemical equation is N2+O2 2NO.If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established
What are the concentrations of HSO4-, SO42-, and H+ in a 0.255 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
For a gene suspected of causing hypertension in humans, you observe the following genotype frequencies: A1A1 0.574; A1A2 0.339; A2A2 0.087. Is this gene in Hardy-Weinberg equilibrium
The next most abundent isotope is 26Mg, relative atomic mass 25.98259. The third Isotope is 25Mg whose natural abundance is in the ratio of 0.9083 to that of 26Mg. What is the relative atomic mass of 25Mg?
The concentration of this compound in the sample is 0.000030 M and the path length of the sample is 1.0 cm
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