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A 100 ml sample of water is taken from pacific ocean and water is allowed to evaporate. The salts that remain (NaCl) have a mass of 3.85. Calculate the original concentration of NaZcl in g per liter, in the water sample.
If Kp = 1.80 for this reaction, what is the total pressure inside the vessel at equilibrium?
A piece of iron 12 mm by 15 mm has a mass of 3.6 grams. Explain what is the thickness of the piece of iron, in mm given that the density of iron is 7.8 g/cc
A cube of material measures 1.20 x 10-2 m on a side and has a mass of 1.70 x 10-3 kg. Seawater at the surface of the ocean has a density of 1.03 g/cm3 . Will this cube float on water?
the mass of an electron is 9.11times 10-31rm kg. if the de broglie wavelength for an electron in a hydrogen atom is
The combustion of heptane with oxygen is a well known process. Write a balanced equation for the reaction of heptane, C7H16, with oxygen, O2, forming the products carbon dioxide, CO2, and water, H2O. What mass of water will be produced by the comp..
a sample of riboflavin has a molar absorptivity of 1.67 x 10^3 L(mol x cm). What is the concentration of a solution with an absorbance of 0.484? The pathlength is 1.00cm.
in the reaction a rarr products a is found to be 0.490 m at t72.0 s and 0.474 m at t82.6 s.what is the average rate of
What is the maximum Mg2+ concentration that will avoid precipitation in a solution of pH = 10
Which of the following choices is insoluble? Imagine that and are cations and , , and are anions, and that the following reactions occur: Which of the following choices is insoluble? AX AY AZ BX BY BZ
when glucose is methylated with dimethylsulfate in aqueous base and then hydrolyzed with dilute acid the only product
What is the complete and balanced chemical equation for. Lithium Sulfate+Lead(II) acetate ? Copper(II) nitrate+Sodium sulfide? Strontium nitrate+potassium iodide
Suppose that the substance studied in the lab is 62.1% carbon, 27.6% nitrogen and 10.3% hydrogen. Determine the molecular formula for the compound.
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