Answer: 0.050M urea, 0.10M glucose, 0.2M sucrose, pure water
Explanation:
Vapor pressure refers to the ease with which a liquid substance is transformed into vapour. High vapour density implies that the liquid is easily transformed into gas. Pure water is expected to have the lowest vapour density since it is held by strong intermolecular forces in the liquid state. Urea is an organic liquid held by weak Van der Waals forces hence its extremely high vapor pressure.
Ionization Trend: First ionization energy will increase left to right across a period and increase bottom to top of a family (column).
A) Sr, Be, Mg are all in column 2 of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Be, Mg, Sr
B) Bi, Cs, Ba are all in the same row of the periodic table. Based on the first ionization rule above, from increasing to decreasing energy, the order is: Bi, Ba, Cs
C) Same rule as above. Order is: Na, Al, S
Answer:
Concentration of the first solution: approximately 0.200 mol/L.
Concentration of the diluted solution: approximately 0.0250 mol/L.
Explanation:
Refer to a modern periodic table for relative atomic mass data:
- H: 1.008;
- S: 32.06;
- O: 15.999.
Formula mass of sulfuric acid :
.
Number of moles of in of this substance:
.
Convert cubic centimeters to liters:
.
.
.
Concentration of this solution:
.
While both the volume and the concentration of the solution changes when it is diluted, the number of moles of in this solution will stay the same. Number of moles of in this of concentrated solution:
.
That will be the same as the number of moles of in the diluted solution.
Concentration of this solution after it is diluted to :
.
Answer:Acceleration due to gravity is 9.8m/s per second. During the next second you are already falling at 9.8m/s and accelerating to 19.6m/s. So you fall another 9.8 meters, plus 4.9 meters to account for the acceleration. During the third second, you fall 19.6 meters plus 4.9 meters to accout yet again for acceleration.
Explanation: