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1. How would the observed molar mass of the unknown liquid have been affected by the following circumstances. (would it be higher than the true value, lower than the value or remain unchanged.) a) Because some portion of the neck of the flask was above the hot water level, not all the vapor in the flask was at the same temperature. b)Some of the liquid had not yet vaporized when the flask was removed from the bath c) While the flask was cooling, some of the vapor effused through the foil pinhole in the cap.
Calculate the amount of heat required to completely sublime 23.0g of solid dry ice (CO2) at its sublimation temperature
A sample of 1.0 mole of a perfect gas with cp= 20.8 J K-1 is initially at 3.25 atm and 310K. If it undergoes reversible adiabatic expansion until its pressure reaches 2.50 atm. Calculate the final volume and temperature and the work done.
Ammonium carbamate (NH2COONH4) is found in the blood and urine of mammals. At a temperature of 424 K, Kc = 0.080 for the following equilibrium:
a saturated solution of bariumchloride at 30C contains 150g water. how much additional barium chloride can be dissolved by heating
An unknown sample with a molecular mass of 180.og is analyzed to yeild 40% c, 6.7% H, and 53.3% o. What is the empirical formula and the molecular formula of this compound?
A 75 kg person drinks 550 g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 20% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
A key oxidative step(s) in the B-oxidation cycle of fatty acids includes: a. addition of water to a double bond b. generation of a double bond from two adjacent -CH2 carbons
shown to contain 12.518 g silver, 0.6970 g carbon, and 2.786 g oxygen. What is the empirical formula of the sample?
use average bond energies to calculate delta hrmrxn for the combustion of methane rmch4
Calculate the [NH3] and [H4Cl] in the buffer solution. Calculate the pH of the buffer solution.
Give the shape of each molecule in problem and describe whether each molecule is polar or non polar and tell whether each is soluble or insoluble in water
1.given that nickelii perchlorate that is a polyatomic ion with the formula clo41- dissolving in water first of all
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