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1)The emulsifying agent from hand cream, a salt, is prepared from two chemicals.
a. Write the structure of stearic acid.
b. Write the structure of triethanolamine.
c. Write the structure of the salt.
d. In the above salt, label the hydrophobic part of the salt and the hydrophilic part.
2) Compare the structure of the emulsifying agent to that of a soap. How are they similar?
assume you dissolve .297 g of the weak acid benzoic acid in enough water to make 105 mL of solution and then titrate the solution with .141 M NaOH. What are the concentrations of Na+ at the equivalence point?
Acetylene gas (C2H2) is produced as a result of the following reaction. CaC2(s)+2H2O(l) = C2H2(g)+Ca(OH)2(aq) . If 32.0 g of CaC2 are consumed in this reaction, how many moles of H2O are needed?
Compute the number of rads and rems of radiation in five years from such a level of plutonium.
At 0.0oC, if the volume of air is 3.1 mL and the pressure of the atmosphere that day is 815 mmHg, what is the number of moles of air?
Calculate the amount of heat energy required to convert 55.0 g of water at 62.5 degrees Celsius to steam at 124.0 degrees Celsius
A 12 kg block of ice has a temperature of -10.0 degrees celsius. The pressure is one atmosphere. The block absorbs 4.50 times 10 to the sixth power J of heat. What is the final temperature of the liquid water?
Aluminum has a specific heat of 0.900 J/g·°C. How much energy is required to raise the temperature of 160. g of aluminum from 20.0°C to 183.0°C?
A sample of oxygen gas is collected over water at 25 degrees C. and a total pressure of 654 torr. The volume of gas collected is 500 mL. What mass of oxygen is collected? The vapor pressure of water is 25 degrees C at 23.8 torr.
how can you tell when the hydrolysis of starch is complete? Why does the test work this way? What is the monosaccharide that results at the end?
Calculate the mass of pure silver that when heated from 12.0 degrees celcius to 15.2 degrees celcius it required 1.25 kj of energy
it is found that 1.431g of element x ciontains 7.509 *10^21 atoms. calculate the atomic mass of x
How many kilograms of sodium fluoride would be needed to treat a 8.00 x 10^7 gal reservoir
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