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construct the appropriate calibration curve as described in this lab and determine the %(W/W) of fluoride in the original toothpaste sample:Fluoride standard mV3.0 ppm 495.3 ppm 337.5 ppm 2410.0 ppm 1712.0 ppm 12unknown (from 0.54g toothpaste) 15
What is the formal charge of the N atom in the correct or best Lewis structure for CN-?
The total volume of seawater is 1.5X10^21 L. Assume that seawater contains 3.1 percent sodium chloride by mass that its density 1s 1.03 g/mL. Calculate the total mass of sodium chloride.
The next generation "ultra supercritical" power plants may operate with steam pressures of up to 300 bar. However, material strength limitations prevent operation of high pressure equipment at temperatures above 600 C.
The coal that is burned is a form of pure carbon. (Diamonds and graphite are other forms of pure carbon). A sample of coal is completely burned in a 10.0 L cylinder at a constant pressure of 1.10 atm and a temperature of 1000 oC.
What is the maximum number of moles of AgCl that could be obtained from this mixture?
what is the corresponding pressure difference between points A and B, in mmHg. At which point (A or B) is the pressure higher, and why? The temperature is 60 °F throughout
C5H12O, a gasoline additive used to boost octane ratings, has a standard heat of formation of -313.6kJ/mol. write a balanced equation for its combustion reaction, and calculate its standard heat of combustion in Kilojoules
How many moles of urea (60. g/mol) must be dissolved in 100 g of water to give a 2.5 molal solution?
Breathalyzers determine the alcohol content in a person's breath by the following (unbalanced) redox reaction:
Nitrogen and hydrogen combine at high temperature, in the presence of a catalyst, to produce ammonia. N2 (g) + 3H2(g) >> 2NH3(g)
Using an aqueous solution of Ba(NO3)2 the density of this solution is measured to be 3.640g/ml and this solution containing barium nitrate mole fraction of 0.01704. compute the molarity of this solution?
Mt. Kilimanjaro in Tanzania is the tallest peak in Africa (19,340 ft.). On a particular day, the barometric pressure at the top of the mountain was 330 torr. On that day, at what Celsius temperature did water boil on the top of the mountain?
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