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calculate the percentage of empty space in 1 mole of water at 25 c. obbtain the density from the experiment" some measurements of mass and volume." the volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen atoms and the oxygen atom. use the single bond covalent radii of 37 pm for hydrogen and 66 pm for oxygen.
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
an 11.0-g of NaCl is dissolved in 125 g of water, with both substance at 25.0'C. calculate the final temperature of the solution assuming no heat lost to the surrounding and assuming the solution has a specific heat capacity of 4.18J/'C g
A sample of Nitrogen gas occupies 1.55L at 27.0 degrees C and 1.00 atm. What will the volume be at -100.0 degrees C and the same pressure?
Rb has two naturally occurring isotopes 85Rb and 87Rb, with masses 84.9118 amu and 86.9092 amu, respectively. The average atomic mass is 85.468 amu.
A solvent for an industrial process requires the use of phenol or benzene. Both are about the same in effectiveness for the process, and of course, gloves will be used when handling either solvent
In the welding shop of the XYZ Manufacturing plant you have a cylinder with a volume of 548L of a compressed gas, and the pressure gauge shows 238 psig at the room temperature 25 C.
If 159 of wet is collected over water at 24 and a barometric pressure of 737 , how many grams of have been consumed.
I need help in describing the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
describe the change in conductivity as the concentration of the NaCl solution was increased by the addition of NaCl drops
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
Molar Mass of Sulfur based on molality, What would the molar mass of sulfur be based on the following data and information?
Explain why the C=C stretching mode gives rise to a rather weak IR band in 1-methylcyclohexane, while in its isomer
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