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Now using the formula for freezing point depression. Let's calculate the decrease in temperature of the system. Let us assume that 17 g is the approximate weight of salt in 1 tbsp, and that the freezing point of water is equivalent to 0°c
If 15% (m/m) NaOH solution has a total mass of 375 g, how much NaOH was used to make this sample?
A compound of molar mass 229 g/mol
g/mol contains only carbon, hydrogen, iodine, and sulfur. Analysis shows that a sample of the compound contains 6 times as much carbon as hydrogen, by mass.
a 2.0 liter container of nitrogen has a pressure at 3.2 atm. what volume would be necessary to decrease the pressure to 1.0 atm
A student started this experiment with a mixture weighing 2.345 g. After separating the components, a total of 2.765 g of material was recovered. Assume that all the weighings and calculations were done correctly. How do you account for the apparent increase in weight of the recovered material?
The solubility of a gas is 4.5 g/l at a pressure of 1.0 atm. At what pressure will there be solubility of 45 g/l
Electron scattering by isolated atoms and molecules occurs in the gas phase. It plays a key role in plasma physics and chemistry and it's important for such applications as semiconductor physics.
Electron scattering experiment provides most accurate values of the sizes of atomic nuclei.
Estimate the rough energy of electron required for this.
Ans: ~250 MeV
What types of element are involved in ionic bonding
Calculate the hydroxide ion concentration at 25 in a solution whose pH is 5.78. (kW=1*10_14moldm at25)
If 3.00 moles of H2O are produce, how many moles of oxygen must be concumed?
