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To determine the organic material in a dried lake bed, you have determined the percent carbon by mass at two different locations. In order to compare the means of the two different locations, you need to determine whether the standard deviations of the two locations are different first
Location 1 (data set 1): 30.4, 30.3, 30.3, 30.4, 30.2Location 2 (data set 2): 30.2, 30.9, 30.3, 30.7, 30.4
1. For each data set, calculate the standard deviation.
2. What is the calculated F-value for comparing the standard deviations?
Calculate the Ka for the acid. The initial concentration of the acid is 0.010m?
Is the dissolution of borax in water a temperature dependent reaction or is it spontaneous at all temperatures at which water is liquid?
how many grams of ammonium nitrate are necessary to form 0.852 moles water.
A gas thermometer has a volume of 83.3 mL at 20 degrees C. After being placed in a container whose temperature is to be measured its volume ( at the same pressure ) dropped to 67.3 mL. The new temperature is?
A compound, C7H12O4, has an IR spectrum showing a peak at 1735 cm-1. Its 1H NMR spectrum has peaks at delta 1.3 (6 H, triplet), 3.4 (2 H, singlet), and 4.2 (4 H, quartet). Draw its structure
A 0.682 g sample of an unknown weak monoprotic organic acid, HA was dissolved in sufficient water to make 50 milliliters of solution and was titrated with a 0.135 molar NaOH solution.
Which of the following represents the energy that is not available in a system to do work at a particular temperature
What is a catchy, orignal slogan for the element neon that describes one of its important uses?
What is the equilibrium partial pressure of Cl2 at 250 oC? What is the value of Kc at the same temperature?
In a titration, 25.0 mL of 0.154 M HCl was added to 45.0 mL of 0.213 M ammonia (NH3). What is the pH at this point? (Kb of NH3 = 1.8 × 10-5 )
50.00 mL of 0.10 M HNO2 (nitrous acid, Ka = 4.5 ´ 10-4) is titrated with a 0.10 M KOH solution. After 25.00 mL of the KOH solution is added, the pH in the titration flask will be
The lowering of vapor pressure is expressed as Raoult's law. An ideal solution obeys Raoult's law. Discuss the reasons why real solutions differ from Raoult's law.
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