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When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? Kf = 1.86 °C/m for water.
a scientist wishes to compress 50.0 ml of ammonia gas at normal atmospheric pressure to a volume of 1.0 ml. what
the presence of the radioactive gas radon rn in well water obtained from aquifers that lie in rock deposits presents a
Explain this will not affect the yield but the reaction will proceed at half the rate. Throughout the addition of bromine to trans-cinnamic acid, the subsequent amounts were used: 10.0 mmol trans-cinnamic acid, 6.0 ml glacial acid and 10 ml 1.0 M s..
If the aspirin crystals were not completely dried before the melting point was determined, what effect would this have on the observed melting point
A first order reaction has a rate constant of 2.75 X10-5 s-1 at 30 Celsius. Explain what is the frequency factor if the activation energy for the reaction is 8.02 kj/mol? R=8.314 J/mol K
What is the concentration (in mg/L) of dissolved O2 in blood (or water) at this partial pressure and a normal body temp of 37 C? The solubility of O2 in water at 37 C and 1 atm partial pressure is 1.93 x 10^-3 mol/L.
If a mixture of 35.8 g of CH4 and 75.5 g of S reacts, how many grams of H2S are produced? CH4(g)+4S(g)-->CS2(g)+2H2S(g).
Diamonds are measured in carats where 1 carat= 0.200 g. The density of diamond is 3.51 g/cm^3. What is the volume of a 2.50-carat diamond
terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. it contains only c h
An element has a half life of I month. Given 1000 radioactive atoms, how many radioactive elements will remain after 3 months?
A balloon at a pressure of 755 torr and a volume of 5.00 L. was allowed to rise in the atmosphere to a point at which the pressure inside and outside the balloon was 697 torr. What was the volume of the balloon at that altitude, assuming the tempe..
how will you be able to visibly detect the oxidation proces of benzyl alcohol to
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