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1a)A reaction has a first order rate constant of 4.31x10-5 s-1 at 25oC and 0.00111 s-1 at 65oC. What is the value of the rate constant at 43oC?
Enter your answer in units of s-1, accurate to three significant figures
1b)(a) What is the value of the reaction quotient (Qc ) for the reaction below if a 2.75-L flask contains 0.0282 mol NO2(g) and 0.612 mol N2O4(g) at 25°C?
N2O4(g) ? 2 NO2(g), Kc = 4.61x10-3 at 25°C
Enter your answer with 3 significant digits.
(1c) If the reaction is not at equilibrium, in which direction will the reaction proceed-toward products or reactants?
Determine how much time (in seconds) is needed to form 150. g Na from a sodium chloride melt by a 25 Ampere current?
When you heated the hydrated compound this process starts slowly at first find out the reason behind this and compute k for this acid if A 0.020 M solution of weak acid HA is 0.60% ionized.
A 23.7-g sample of ethylene glycol, a car radiator coolant, loses 906 J of heat. What was the initial temperature of the ethylene glycol if the final temperature is 32.5 degrees Celsius (c of ethylene glycol=2.42 J/g*K)
If 1.00 g of an unknown molecular compound contains 8.35 x1021 molecules, what is its molar mass
You have two gas tanks, one is 7.00 L and the other is 3.50L, and one of the tanks has oxygen in it and the other has acetylene. If the tank wth the oxygen has a pressure of 145 atm, what is the pressure of the other tank?
An average adult inhales a volume of 0.50 l of air with each breath. if the air is warmed from room temperature (20c) to body temperature (37c) while in the lungs.
A compound has the empirical formula CH2O. When 0.0866g is dissolved in 1.000g of ether, the solution's boiling point is 36.5 degrees C. Determine the molecular formula of this substance.
What is the hardness of this mineral? What is the specific gravity of this mineral? show your calculations. Using all these properties, identify this mineral?
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
Nitrogen forms more oxides than any other element. The percents by mass of N in three different nitrogen oxides are (I) 46.69% (II) 36.85% (III) 25.94%. For each compound, determine
Determine thel volume (mL) required to prepare each of the following: a)20.0 mL of a .250 M KNO3 solution from a 6.00 M KNO3 solution. b)25.0 mL of 2.50 M H2SO4 solution using a 12.0 M H2SO4 solution. c).500 L of a 1.50 M NH4Cl solution using a 10..
a gasoline additive used to boost octane ratings, delta H f has = -313.6 kJ/mol. C5H12O (l) + 15/2 O2 (g) ---> 5Co2 (g) + 6 H2O (l) Calculate its standard heat of combustion in kilojoules.
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