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Using the value of Ka from your titration curve, calculate that pH at the equivalence point?
At 340 K, Kp = 69 for the reaction H2(g) + I2(g) ô€• 2HI(g). 50.0 g of HI is injected into an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinder when the system comes to equilibrium?
burning 0.115g of the compound in oxygen gives 0.379g of CO2 and 0.1035g of H2O. what is the empitical formula of mesitylene.
For a particular sample of copper, two peaks were obtained in the mass spectrum,showing an abundance of 69.10% at m/e 63 and 30.90% at m/e 65. Calculate the relative atomic mass of this sample of copper to three significant figures, using the data g..
In the chemical formula for alu, there are 12 water molecules present. It is also possible to prepare the anhydrous compound potassium aluminum sulfate. On the "molecular scale" describe how a crystal of alum differs from a crystal of potassium al..
Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream.
If the methane contained in 4.00 L of a saturated solution at 25 C was extracted and placed under STP conditions, what volume would it occupy?
What molar ratio of sodium acetate to acetic acid (NaAc/HAc) should be used in preparing a buffer having a pH of 4.35? (Ka = 1.8×10-5 for acetic acid.)
What is the theoretical yield of aspirin in the reaction of 3.60 grams of salicylic acid with excess acetic anhydride?
The radioactive decay of a certain sample produced 936 disintegrations per minute. Exactly 3.00 days later, the rate of decay was found to be 511 disintegrations per minute. Calculate the half-life, in days, for the decay of this sample.
What is the molarity of a HCl solution if the reaction of 200mL of the solution with excess CaCO3 produces 10.5L of Co2 gas at 725mmHg and 18C?
Sodium nitrate decomposes upon heating to form sodium nitrite and oxygen gas. This reaction is sometimes used to produce small quantities of oxygen in the lab. How many grams of sodium nitrate must be heated to produce 128g of oxygen?
Would the following procedural errors cause an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case.
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