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Some copper compounds emit green light when they are heated in a flame. how would you determine whether the light is of one wavelength or a mixture two or more wavelengths
An aqueous solution has a density of 0.80g/mL and is 51.0% C2H6O by mass. Determine the molar concentration of C2H6O.
talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. it is used as
classify each of the following as oxidation or reduction: a)electrons are gained b)requires a reducing agent c)Ni(s)>Ni^2+(aq) d)MnO4^-(aq)>MnO2(s) e)Sn^4+(aq)>Sn^2+(aq)
A solution of a dye in a 0.80 cm cuvette of concentration 1.25 x 10^-3 M had an absorbance of 0.115 at a particular wavelength. What was the molar absorptivity of the dye
Organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluble at room temperature, they add water and this often works. why
How many grams of aluminum metal and how many liters of chlorine gas can be produced by passage of 4.8 amp of current for 2.3 hour under standard conditions (25?C and 1 atm pressure)?
At 33°C, what is the osmotic pressure of a 0.6% by weight NaCl, in water. (The density is 1.0 g/mL at 33°C)
A nail is measured with a ruler and its length is reports as 5.46 cm. Select ALL the statements that are correct about the certainty and uncertainty represented in this recorded measurement.
The mole fraction of A in the vapor is found to be 0.67. What is the mole fraction of A in the solution?
Name 4 properties of a compound that is directly influenced by the polarity of the compond. And state the 2 most important factors that affect the
the half-life of tritium 31h is 12.3 years. if 47.0 mg of tritium is released from a nuclear power plant during the
KMnO4 is used as the tirant in a potentiometric titration of tin(II) to tin(IV), using a S.C.E. reference electrode. The potential of the indicator electrode at the equivalence point would be calculated as:
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