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The fat content in milk can be measured by the extration with hexane. a 50.0g sample of whole milk was mixed with hexane and gently stirred. two liquid layers were obtained -- a lower, "milky" layer and an upper layer of hexane. the layers were separated and the mass of the milky layer was found to be 47.8g. calculate the percentage of fat in whole milk.
What is the total pressure, in mmHg, of a gas mixture containing argon gas at 0.25 atm, helium gas at 350 mmHg, and nitrogen gas at 360 torr
if you have 380.00 ml of water at 25.00 degrees celcius.and add 130 ml of water at 95.00 degrees celcius, what is the final temperature of the mixture?
Calculate the pH of the buffer solution that results from mixing 65.0 mL of 0.15 M HCHO2 with 40.0 mL of 0.13 M NaCHO2
How many moles of oxygen are in a compressed cylinder that has a volume of 8.00 L at a pressure of 41.0 atm and at 25 degrees celcius?
Give the balanced equation for the reaction: formation of 1 mol nitrogen dioxide from its elements (heat is absorbed)
Calculate the wavelength of an 81kg athlete running a 4 minute mile. calculate in nanometers.
A solution is 0.43 M Sr(OH)2. What are the concentrations of H3O+ and OH ‾ in this solution?
compute the volume of the tank if this tank has 115 moles ofnbsp neon gas and has a pressure of 57 atm at a temperature
The activation energy for a given reaction is 87 kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from 37 °C to 15 °C
Find the volume of oxygen - What volume of oxygen is needed to completely combust 2.07 L of methane gas
Calculate the pressure that CCl4 gas will exert at 40 degrees celsius if 1.00 mol occupies 28.0 L, assuming that A. CCl4 obeys the ideal-gas law
imagine that you own a pharmacy in your area. one of your competitors launches a we will not be undersold campaign
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