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1. Consider the following equilibrium: C(s) + 2H2(g) ? CH4(g) + 74 kJ When a small amount of solid C is added to the system A. [H2] decreases B. [CH4] increases C. The temperature increases D. All concentrations remain constant
A 75.0 mL volume of 0.200 M NH_3 ( Ksp=1.8* 10^-5) is titrated with 0.500 M HNO_3. Calculate the pH after the addition of 23.0 mL of HNO_3.
It is desired to produce an aqueous solution of pH=8.75 by dissolving one of the following salts in water at 298 k. Which salt would you use and at what molar concentration?
This standard reaction will only be spontaneous at high temperatures (T > 550 K) This standard reaction will only be spontaneous at low temperatures (T
An IR spectrum for a sample of this solvent is found to show no appreciable absorbance in the region of 1700 cm-1. Of the given possibilities, what is the most likely identity for this paint solvent
You may want to write out the reaction)When ethane (C2H6) reacts with chlorine (Cl2) the product is C2H5Cl and HCl. In a certain experiment 165 g of C2H6 reacts with 255 g of Cl2.
Ultra-high-vacuum experiments are routinely performed at a total pressure of 1.0x10^-10 torr. Calculate the mean free path of N2 molecules at 350K
A swimming pool has a volume of 1.8 x 104 gallons. How many hours will it take to fill the pool if water is added at a rate of 3.9 gal/min
Three solutions are mixed together to form a single solution. one contains 0.2 mol pb(CH3COO)2, the second contain 0.1mol Na2S and the third contains 0.1mol CaCl2. A. write the net ionic equations for the precipitation reaction or reactions that o..
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide in a first-order process. If k=2.5 x 10 to the 3rd s-1 at -5degrees C and k=3.5 x 10 to the 4th s-1 at 25 degrees C, what is the activation energy for the decomposition?
a 16 ounce speciality coffee drink contains 254mg caffeine. if all the caffeine is extracted and dissolved in an equal
assume that 3.0g of aniline and 4.5 ml of acetic anhydride are used in the preparation of acetanilide according to the
If 3.70 mol of ethane, C2H6, undergo combustion according to the unbalanced equation given below, how many moles of oxygen are required? C2H6 + O2-> CO2 + H2O
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