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Assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water is 0.0 ^\circ {\rm C} and K_f is equal to 1.86 ^\circ {\rm C}/m.
Gallium has two common isotopes Ga-69 and Ga-71. Suppose we wanted to use the Ga-71 isotope for some reason, and obtained a pure 6.0g sample of Ga-71.
what volume of bleach (6%w/v=6g/100ml) would be required to oxidize 5.0 mL of methanol (density 0.890 g/ml) to methanone?
After filtering, washing, drying, and weighing, the AgBr is found to weigh 0.609 g. What is the mass percent bromide in the metal salt?
What is the pH of the final solution? Answer IS 7.58 Q 3.) What additional volume of 10.0 M HCl would be needed to exhaust the remaining capacity of the buffer after the reaction described in Part B?
octane has a density of 0.692g/ml at 20C. How many grams of O2 are required to burn 30.5 gal of C8H18
In the process, a photon of wavelength 1.28Ã-10-6 m is emitted. What was the value of the principal quantum number for the higher energy level?
has a volume of 58.0L and a pressure of 645mmHg. What is the temperature, in kelvins and degrees Celsius, of the gas?
Choose one of the non-heme based oxygen transport proteins (i.e. not hemoglobin or myoglobin). Sketch the oxygen binding site environment
along with the weight of sodium acetate (4.01g) and the volume of acetic acid used (10mL) to prepare the buffer, the expected pH of it was 5.43. What is the expected pH of buffer plus added HCl?
What NaCl concentration results when 299 mL of a 0.820 M NaCl solution is mixed with 407 mL of a 0.450 M NaCl solution? When heated, KClO3 decomposes into KCl and O2
A camping lantern uses the reaction of calcium carbide, CaC2 (s) , and water to produce acetylene gas C2H2 (g) , and calcium hydroxide, Ca(OH)2 (s) . How many grams of water are required to produce 1.55 moles of acetylene gas
If 4.50 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
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