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A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
calculate the number of grams of acetic acid per 10ml of the vinegar. Since vinegar has a density of about 1.00 gram/ml, 100 ml eighs about 100 g.
Air has a density of about 1.2 kg/m3. One standard atmosphere (1 atm) is about 105 Pa. Assuming that the density of air remained constant as altitude increased, how high would the Earth's atmosphere have be to create a pressure of 1 atm
The element X occurs naturally to the extent of 20.0% superscript 12X and 80.0 % superscript 13X. The atomic mass of X is nearest:
A chemical reaction in which the atoms of the reactants undergo a change in the oxidation state is called a redox reaction. Such involve both oxidation (increase in oxidation state) and reduction
A sample of solid ammonium sulfide (NH4)2S is placed in a closed bulb which is then filled with 0.0150 mol of inert HE gas. The pressure of the He at 25 degrees Celsius is 145 mmHg.
a sample of 4.47 grams of a molecular compound is that dissolved in 96 grams of tetrachloromethane ccl4. the normal
How would the results differ if you added sodium p-toluate instead of p-toluic acid to the two-layer mixture of tert-butyl methyl ether and water
10.0 mL of a 0.30 M sodium phosphate solution reacts with 20.0 mL of a 0.20 M lead(II) nitrate solution (assume no volume change). What is the concentration of phosphate ions left in solution after the reaction is complete
Consider an infrared grating with 84.0 lines per mm and 15.0 mm of illuminated area. calculate the first-order resolution (λ/Δλ) of this grating. How far apart in cm^-1 must two lines centered at 1200 cm^-1 be if they are to be resolved.
Determine the amount of energy or work that the silicon nitride tip could absorb before being plastically deformed, assuming no initial cracks. Volume is in part A.
How many gallons of ethanol can be produced per 100 tons (bone dry short ton) of dry corn stover. Assume the corn stover composition. 40% glucan, 30% xylan, 15% lignan, 10% ash. and 5% protein-others.
What is the functional group that is common to all amino acids. Ester Nitrile Amide Nitrogen Hydroxy
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