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Combustion analysis of naphthalene, a hydrocarbon used in mothballs, produced 8.80 CO2 and 1.44 H2O. Calculate the empiracle formula for naphthalene.
What kinetic energy must the electrons have in order to resolve a protein molecule that is 4.60 nm in diameter. Take the mass of an electron to be 9.11× 10-31 kg.
What is the maximum concentration of Mg2+ ion that can remain dissolved in a solution that contains 0.7719 M NH3 and 0.3031 M NH4Cl?
How many grams of IO2F are needed to react completely with 150.0 g of BrF3? 3IO2F(s) + 4BrF3(l) → 3IF5(l) + 2Br2(l) + 3O2(g)
How many kilograms of water must be processed to obtain 4.0 L of D2 at 24°C and 0.91 atm pressure? Assume that deuterium abundance is 0.016 percent and that recovery is 64 percent.
what percentage of HSO4- is dissociated in 2M solution? Why does molarity approximate molality at low concentrations?
The following set of data was obtained by the method of initial rates for the reaction: S2O8^-2 + 3I^- --> 2SO4^-2 + I3^- Exp [S2O8^-2] [I-] Initial Rate (M s^-1) 1 0.25 0.10 9.00 x 10^-3 2 0.10 0.10 3.60 x 10^-3 3 0.20 0.30 2.16 x 10^-2 What is t..
how many grams of water can be cooled from 45 to 18 by the evaporation of 62 of water? the heat of vaporization of
What is the molecular formula of each compound. (Type your answer using the format C6H12O6 for C6H12O6 and use the same order of the elements as in the empirical formulas.
If a 1.00 cm^3 solid cube of alumina ceramic initially at 300 C is placed in 50 ml of H2O initially at 25C in a closed, insulated container: (a) what will be the final temperature of the system when thermal equilibrium is attained.
Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.20 mm.
If the copper is drawn into wire whose diameter is 8.20 , how many feet of copper can be obtained from the ingot? The density of copper is 8.94.
Difluoromethane gas (CHF2) was placed in a 5.0 litre cylinder at 1.3 bar at 25 C. What is the mass of CHF2
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