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Ben Franklin dropped the oil on the surface of a lake and found that 2 mL of oil gave a circle of radius 30 m. Estimate the volumetric size of an oil molecule in angstroms, give one significant digit.
How many mL of 0.64 molar NaOH must be added to 39 mL of 0.11 molar HCl to completely neutralize the acid.
Calculate the temperature of the system once equilibrium has been reached. Assume that Cp,m for Au and H2O is constant at its value for 298K throughout the temperature range of interest.
The pH of a bicarbonate-carbonic acid buffer is 6.95. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-)
55.0 calories of heat are added to a small lead block. If the temperature of the lead increases from 27.0°C to 59.2°C, what must be the mass of the lead block?
a student had 1.00 l of a 1.00 m acid solution. much to the surprise of the student it took 2.00 l of 1.00 m naoh
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)
one of the steps in the commercial process for converting ammonia to nitric acid involves the conversion of nh3 to
When 1.543 g of copper(II) sulfate pentahydrate is heated to drive off the water of hydration, how many grams of copper(II) sulfate and water are formed?
In the double stranded helix structure of DNA, which bases are always hydrogen bonded to the following: cytosine, thymine, adenine, and guanine
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
Which of the following would be a correct ranking of the following gases based on rate of effusion at STP. N2, O2, NO, NO2, N2O, N2O3
Given the following data for mercury, (Hg), estimate the temperature at which mercury boils at 1 atm.
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