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A compound containing only C, H, and O was extracted from the bark of the sassafras tree. The combustion of 50.7 mg produced 138 mg of CO2 and 28.2 mg of H2O. The molar mass of the compound was 162 g/mol. Find out its empirical and molecular formulas
Which of the following processes are spontaneous? (Select all that apply.) A satellite falls back to earth. A kitchen gets cluttered. A house is built. A satellite is launched into orbit.
Suppose you live in an alternate universe where a different set of quantum numbers is required to describe the atoms in that universe. The quantum number rules in the alternative universe are
the enthalpy change when a strong acid is neutralized by strong base is -56.1 kjmol. if 135 ml of 0.450 m hi at
If a student used 12.45mL of their NaOH solution to neutralize 10.00mL of a 0.543M KHP solution, then what is the concentration of the student's NaOH solution
What is the mass, and the volume, of this seawater that contains 1.00 g of oxygen?
for the reaction P4+S8=P4S10 what is the maximum amount of P4S10 which could be formed from 17.02 g of P4 and .128 mol of S8?
what change in the number of moles of Ag occurs in the system? (2)what change in the concentration of Ag occurs in the system?
How many grams of ethylene glycol C2H6O2 must be added to 1.15kg of water to produce a solution that freezes at -3.68 degrees celsius?
A bomb calorimeter has a heat capacity of 2.47 kJ/K. While a 0.105 g sample of ethylene (C2H4) was burned in this calorimeter, the temperature increased by 2.14K. Compute the energy of combustion for one mole of ethylene.
Calculate DG for the reaction CS2 +3 CL2 -> S2CL2 + CCL4 given DH =-231.1 kJ and DS= -287.6 J/k - The answer is -145.3 Kj please show work as to how they got this answer.
If the stove supplies 357 J/s as well as no heat is lost to the surroundings, how long does it take for the water to boil. Presume that room temperature is 17.2 oC. The specific heat of copper is Cp = 0.385 J/g•°C.
Half-life equation for first-order reactions: (the 1/2 in t1/2 is a subscript) t1/2=0.693/k where t1/2 is the half-life in seconds (s) , and k is the rate constant in inverse seconds (s^-1).
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