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A Snickers® candy bar contains 280 Calories, of which the fat content accounts for 120 Calories. What is the energy of the fat content, in kJ
When alkyl halides react, rearrangements are likely to occur in which of the following types of reactions? A) SN1 B) SN2 C) E1 D) Both SN1 and E2 E) Both SN1 and E1
The isotope 22Na has a half-life of 2.60 years. How much of a 1.00 gram sample would be left after 1.00 yr
10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
A sample of helium gas has a volume of 241 mL at 0.83 atm. What pressure is needed to reduce the volume at constant temperature to 35 mL.
A 2.78 10-4 M solution of a compound has an absorbance of 0.451 at 520 nm in a 1.00 cm cell. The solvent's absorbance under the same conditions is 0.019. What is the molar absorptivity of the unknown compound
Which of the following is NOT a common driving force in displacement reactions? a. precipitation b. evolution of a gas c. formation of a weak or nonelectrolyte d. the transfer of electrons
calculate the number of moles of h2o that will be produced by the reaction of .530 moles of solid aloh3 with excess
Suppose that 0.330 mol of methane, CH4(g), is reacted with 0.480 of fluorine, 0.480 mol, F2(g) forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released
The theoretical value can be computed from the atomic weights of the atoms involved. How
a gas sample has a volume of .150 L at a temperature of 256 K. What volume will the gas occupy at 288K?
If a 4.86g of solid carbon dioxide was placed into an evacuated 2 L container, sealed, and then heated until it completely changed to a gas with a final temperature of 75 degrees calcium, what would be the pressure?
Explain how this system appears static but in fact is a dynamic equlibrium, Na+(aq) + Cl-(aq) --> NaCl(s), that is in constant motion though the mass of solid is constant.
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