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The volume of a piece of topaz (a semiprecious gem) weighing 5.95 g is 1.7 mL. The densities of chloroform, carbon tetrachloride, and dibromomethane are 1.48, 1.59, and 2.50 g/cm3 respectively. On which liquid(s) will topaz float?
Using A flow diagram, show the separation of a mixture containing p-bromoacetanilide, N-cyclopentyl-N-methyl-N-propylamine (N means the group is attached to the nitrogen of the amine) and m-nitrophenol.
The bitter-tasting compound quinine is a component of tonic water and is used as a protection against malaria. It contains only C, H, N and O. When a sample of mass 0.487 g was burned, 1.321 g of carbon dioxide, 0.325 g of water
A 343 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 625 mmHg. Calculate the moles of Ar present.
calculate the radius of the sphere that encloses a 50 probability of finding a hydrogen 1s electron. repeat the
What is the hydronium ion concentration of a 0.100 M hypo hpyochlorous acid solution with Ka=3.5x10^-8? Given the equation for the dissociation of hypochlorous acid.
Explain how a nuclear fission reaction can be controlled to produce heat for power generation, ratherthan an explostion
Explain what is the LUMO/HOMO ratio for a conjugated pi electron system consisting of 1000 carbon atoms. Would you classify it as a conductor
What is the internal energy change for the gas? Give your answer in joules (J), accurate to three significant figures.
what volume of methane, measured at STP, must be burned? (ΔH°combustion for CH4 = -891 kJ/mol)
The decomposition of SO_2_Cl_2_ is first order in SO_2_Cl_2_ , and the reaction has a half-life of 245 min at 600 K. If you begin with 3.6e-3 mol of SO_2_Cl_2_ in a 1.0-L flask, how long will it take for the sample to decrease to 3.2e-4
If you use 25.0 mL of the 0.24M sodium hydroxide solution to titrate a 0.40 M solution, how many mL of HCl will be used
how many grams of magnesium chloride could be formed from the rraction of 6.82 grams of magnesium with excess
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