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A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. Explain the gray color.
It decomposes into its elements. Write the balanced equation for this reaction. If 71.8 g of Hgo is decomposed, calculate the volume of oxygen at STP
when 0.120 mol of carbonis burned in a closed vessel with 6.90g of oxygen. how many grams of carbon dioxide can form??
What is the final concentration (in M) of 19.5 mL potassium hydroxide solution with an initial concentration of 1.85 M which is diluted with 16.8 mL of solvent? Assume the volumes are additive.
the alkyl halide used in the reaction is a primary alkyl halide, and why alkylation does not work at all if a tertiary alkyl halide is used.
How many photons will be required to raise the temperature of 2.3 g of water by 2.1k ? Water is exposed to infrared radiation of wavelength 2.7×10?4 cm . Assume that all the radiation is absorbed and converted to heat.
A gas-phase decomposition is first order with respect to the reactant, R. If the initial concentration of R is 1.0E-4 mol L-1 and the rate constant k=1.08E-6 s-1, what concentration of R remains after 25 days
What is the enthalpy change (in kJ) for burning 73.0 g of methyl alcohol? 2)A reaction that is used to propel rockets is N2O4(l) + 2N2H4(l) --> 3N2(g) + 4H2O(g)
0 .15m h2CO3 and 0.80 m of NaHCO3 are dissolved what is the ph of resulting solution
HCL solution has a lower concentration than what is indicated. will this result indicate the presence of more or less moles of base in the antacid
If 125 cal of heat is applied to a 60.0 g piece of copper at 24C, what will the final temperature be? The specific heat of copper is 0.0920cal/(g x C).
Benzene (C6H6) is converted to cyclohexane (C6H12) by direct addition of hydrogen gas H2. The plant produces 100 Ib-moles/hr of cyclohexane. 90% of benzene fed to the process reacts to form cyclohexane.
For the copper zinc cell the potential at 25 degrees C is 1.10 volts. The reaction is: Cu++ (aq) + Zn(s) = Zn ++ (aq) + Cu(s) Calculate the equilibrium constant for this reaction (a wire is connected and electrons flow between the electrodes)
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