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How many 3L balloons could the 12 Liter helium tank fill without using every molecule. Keep in mind that an exhausted helium tank is not empty. In other words once the gas inside the tank reaches at
Consider the reaction Br2(g) <=> 2 Br(g), which is endothermic as written. What would be the effect on the equilibrium position of decreasing the temperature
Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag. 2NaN3(s) ------> 2Na(s) + 3N2(g) Calculate the value of w (work) for
A buffer is prepared by adding 21.0g of sodium acetate ({\rm CH_3 COONa}) to 520mL of a 0.140M acetic acid ({\rm CH_3 COOH}) solution.
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.080 M in NH4Cl
In the reaction below, 6.15 atm each of H2 and I2 were placed into a 1.00 L flask and allowed to react: H2(g) + I2(g) <=> 2 HI(g) Given that Kc = 45.5, calculate the equilibrium pressure of H2
Many power plants produce energy by burning carbon-based fuels, which also produces carbon dioxide. Carbon dioxide is a greenhouse gas, so over-production can have negative effects on the environmen
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere
Which of the following substances have a standard heat of formation (?Hf°) of zero? Fe at 1200 °C Cl2(g) at 2 atm O2(g) at 25.0 °C and 1 atm C2H6(g) at standard conditions
Complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest while-number coefficients. MnO4^- + SO3^2- ---> Mn^2+ +
The molar solubility of a compound AX2 is 2.5 x 10-3 M. Calculate the value of Ksp for AX2. 1.5 x 10-3 6.3 x 10-8 1.4 x 10-8 3.4 x 10-9 none of these
A 27.0 mL solution of 0.100 M CH3COOH is titrated with a 0.200 M KOH solution. Calculate the pH after the following additions of the KOH solution. a.) 0.00 mL b.) 5.00 mL
Find the pH during the titration of 20.00 mL of 0.1000 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54 x 10^-5), with 0.10 M NaOH solution after the following additions of titrant. a.) 15.00 mL b.) 20.90
What is the pH of the saturated solution of Ca(OH)2 (Ksp = 1.3 x 10-6). 12.14 8.11 11.06 12.37 2. To a 1.00 L solution containing 1.00 x 10-3 mole each of Ca2+, Sr2+, and Ba2+, 0.0100 mole of Na2SO4
The equlibrium constant (Kc) for the following reaction is 6.7 *10^-10 at 630 C N2(s)+O2(g)>2NO (g). What is the equlibrium constant for (Kc) the reaction 1/2 N2(g)+1/2O2(g)>NO(g)
For the following reaction 2SO3(g)>2SO2 (g)+O2(g), the equlibrium constant Kp is 1.32 at 627 C. What is the equlibrium constant at 627 for the reaction SO2(g)+1/2O2.SO3(g)
What are the arguments in favor of the hypothesis that the spliceosome is a ribozyme. How could you test this hypothesis
A gas occupies 10.0 L at 44.1 psi and 27 degrees C. What volume will it occupy at standard conditions
How could you seperate acetaminophen from sucrose, and aspirin. Also generate a flow chart for the separation acetaminophen from sucrose and aspirin
When 1.555g of this compound (molar mass=130.13g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 7.429 degrees celsius. What is the heat ca
The equilibrium constant Kp for the reaction CO(g)+Cl2(g) <--> COCl2(g) is 5.62x10^35 at 25 degrees c. Calculate delta Gof for COCl2 at 25 degrees.
For each of the following strong base solutions, determine [OH-], [H3O+], pH and pOH. a) 0.14 M NaOH? b) 1.7x10^-3 M Ca(OH)2? c) 4.5x10^-4 M Sr(OH)2? d) 8.6x10^-5 M KOH
what is heat capacity. write a simple procedure for determining the heat capacity of your calorimeter