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A solution contains 0.115 mol H2O and an unknown number of moles of sodium chloride. The vapor pressure of the solution at 30 degrees C is 25.7 torr. The vapor pressure of pure water at 30 degrees C is 31.8 torr. Calculate the number of moles of sodium chloride in the solution.
Researchers analyzing an unknown hydrocarbon with chemical formula CxHy found that 225 grams of O2(g) were required for complete combustion of 1.0 mol CxHy, to form CO2(g) and H2O(g) only. Unfortunately, a faulty valve between the furnace and abso..
Utilizing a periodic table arrange the subsequent substances according to their expected lattice energies listing them from lowest lattice energy to the highest- MgS, KI, GaN, LiBr. Use the appropriate symbol to separate substances in the list.
Calculate the energy and wavelength associated with an a particle that has fallen through a potential difference of 4.0 V.
The Lyman series of emission lines of the hydrogen atoms are those for which nf = 1. a) determine the region of the electromagnetic spectrum in which the lines of the Lyman series are observed. b) Calculate the wavelengths of the first three lines..
The dissolved oxygen concentration in a sample of pond water was found to be 7.26 mg/L. Express this concentration in g/m3
Describe and explain how each of the following experimental errors or variations might affect your results.
Which solution has the lower freezing point a) 5 g of ch3oh in 250 g of water or b) 10 g of ch3ch2oh in 500 g water. Explain why
strong/weak and concentrated/dilute. Provide an appropriate example using each of these terms to describe a solution
Nicotine, a stimulant found in tobacco, has the mass percent composition: C, 74.03%; H, 8.70%; N, 17.27%. The molar mass of nicotine is 162.23 g/mol. Find the molecular formula of nicotine.
A red blood cell with an inner concentration of 0.9 g NaCl per 100 mL of solution is placed into a 2.0 g NaCl per 100 mL solution. The cell
a solution initially 0.100 m in hocl and 0.300 m in naocl. what is the ph in 0.030 mol of solid naoh is added to 1.00 l
compute the pressure in atmospheres using the van der waals equation exerted by waterh2o of 23.93 grams at 36.11 degree
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