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An unknown Cu2+ sample gave an absorbance of 0.262 in an atomic absorption analysis. Then 1.00 ml of solution containing 100.0 ppm Cu2+ was mixed with 95.0 ml of the unknown, and mixture was diluted to 100.0 ml in a volumetric flask. The absorbance of the new solution was 0.500. What is the concentration of Cu2+ in the sample? State any assumptions you might make and pay attention to significant figures.
A graduated cylinder contains 110. mL of water. A 10.0 g piece of iron (density = 7.86 g/cm3) and a 18.9 g piece of lead (density = 11.3 g/cm3) are added. What is the new water level in the cylinder?
03 mol sample of NH4NO3 is placed in a 1L evacuated flask, which is then sealed and heated. The NH4NO3 decomposes completely accodring to the balanced equation: NH4NO3-->N20+2H20 The total pressure in the flask measured at 400K is closest to which ..
what would happen to the molar mass of the solute if the thermometer used actually read 1.4 degrees Celsius too high?
given a titration between 60.00 ml of 0.100 m acid ha ka a x 10-6 and the titrant sodium hydroxide naoh whose
addition of hbr to 1-phenylpropene yield only 1-bromopropylbenzene.propose a mechanism for the reaction and explain
Neglecting the contribution of end groups to polymer molar mass, calculate the percentage conversion of functional groups required to obtain a polyester with a number-average molar mass of 24,000 g mol-1 from the monomer HO(CH2)14COOH.
Why is Pyrex glass wool, rather than typical filter paper, used for the filtration of the hot solution of K+, [Al(H2O)2(OH)4]- , excess OH-?
What mass in grams of carbon dioxide is produced if 85.0 mol of magnesium carbonate, MgCO3, are heated and allowed to decompose according to this equation? MgCO3(s)--> MgO(s) + CO2(g)
It is possible to draw a valid Lewis structure that follows the octet rule for all of the following except one. Which one cannot be drawn without violating the octet rule.
smaller dipole moment than formaldehyde, H2C=O, even though it contains electronegative chorine atoms in place of hydrogen. Explain
the dipole measured for is 0.380d . the bond distance is 161pm . what is the percent ionic character of the
What is the pH of the solution if [OH-] of an ammonia solution is 1.0 X 10-2M?
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