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Why is oxygen on the periodic table O? Isn't oxygen O2?................
The question in the lab is asking what percentage by mass is the calcium, chloride and water in the orginal solution for each trial. In this lab we performed two trials, in each, we added 50 mL water to 2.0 g of CaCl2.
The compound 1-iodododecane is a nonvolatile liquid with a density of 1.20g/ml. the density of mercury is 13.6g/ml. what do you predict for the hight of a barometer column based on 1-iodododecane, when the atmospheric pressure is 752 torr
in niobium nb metal the valence orbitals are the 5s 4d and 5p orbitals. if the bonding in nb metal is described used
What is the vapor pressure of each of the solution components in the mixture? What is the total pressure above the solution?
A gas filled balloon with a volume of 12.5 L at 0.90 atm and 294 K is allowed to rise to the stratosphere where the temperature is 268 K and the pressure is 1.0 millibar. What is the final volume of the balloon. (1.0 atm = 1.013 bar).
What effect would each of the following erros have on the determined concentration of the unknown acid? (would the calculated value be too high, too low, or unchanged?) explain
A sealed vessel contains air at STP. It is heated to bring the air to a temperature of 80 °C. What will be the ratio of the mean free path of the air molecules at 80 °C to their mean free path at STP?
A mixture of heptane/decane at 1.8 bar, 120?C contains 80% by mol heptane. At what pressure should it be flashed to obtain a stream that is 90% rich in heptane? What are the composition of the liquid and the amounts of the two phases?
Problem- A mixture of gases is composed of 0.442 moles of He, 0.143 moles of H2 and 0.227 moles of Ar. If the total pressure of the mixture is 1.83 atmospheres, what is the partial pressure of the H2 gas (in atm). Determine the correct value.
Problem- Calculate the resolution for a 1115.5 keV Zn peak that has a FWHM of 2.01 keV. 1) Calculate the resolution for a 1115.5 keV Zn peak that has a FWHM of 200 keV.
Polly Esther determined the Ca2+ ion content of a 100 mL sample of calcium fortified orange juice. After adding 2.0 M HCl solution to the sample, she filtered the juice to remove the pulp and other particulate matter
Compute the molar mass of the bio molecule. For carbon tetrachloride, the boiling point constant is 5.03C.kg/mol. and the boiling point of pure carbon tetrachloride is76.50C.
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