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Suppose the absorbance of an iodine sample changes from 0.6 to 0.7when the iodine concentration in it is increased from 0.3 mM to 0.4mM. What must be absorbance of a blank sample for this caseassuming Beer's law to be valid?
Calculate the masses of the reactants and products of the following equation. Please show work.
The average speed of a nitrogen molecule at 20oC is 515 m/sec. How many minutes will it take the nitrogen molecule to cover exactly 20 km?
Without consulting entropy tables, predict the sign of Delta S for the following process and choose the correct reasoning for your prediction: N2(g, 10 atm) ----> N2(g, 1 atm). The mass of N2 remains constant.
A 0.1036 g sample containing only BaCl2 and NaCl is dissolved in 50 mL of distilled water. Titration with 0.07916 M AgNO3 requires 19.46 mL to reach the endpoint. What is the % by wt. of NaCl in the sample
What is the pH of the buffer that result when 12 g of NaH2Po4 and 8.00 g of NaHPO4 are diluted with water to a volume of 0.50 L ? ( Ka of H2PO4- = 6.2*10^-8 , the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol respectively )
what is this equation and why is it central to the global warming theory: SO2(g) + H2O(l) H2SO3
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure that could be abbreviated as XY2Z2.
The standard electrode potential for the reduction of Ni2+ to Ni is 0.25v. Would the potential of a nickel elctrode immersed in a 1.00M Naoh solution saturated with Ni(OH)2 be more negative than E Ni2+/NI or Less. Explain.
need detailed mechanism for the reaction between monochloramine and dimethylamine to form11-dimethylhydrazineand hcl.
Rewrite the atomic cores in the space below. Place an electron pair between each flourine and sulur core. Write the lewis structure for SF2 in the box, distributing the remaining valence electrons so that all three atoms are in accordance with the ..
What percentage of the Sr-90 that was formed in the detonation of the first fission bombs in August 1945 is still present in the environment in August 2032?
Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water. Kf = 1.86°C/m and Kb = 0.512°C/m. Use 100°C as the boiling point of water.
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