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A sample of liquid nitrogen trichloride in a 2.50 L closed reaction vessel is heated until it decomposes completely to gaseous elements. The resulting mixture exerts a pressure of 745 mm Hg at 95 degress C. What was the mass of the original sample? (Write a balanced equation.)
A 100.0-mL buffer solution is 0.175M in HCIO and 0.150M in NaCIO .What is the pH after addition of 150.0mL of HBr?
The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay?
If the solution is 98.2 (wt/wt %) sulfuric acid and has a density of 1.83 g/mL, calculate the molarity of concentrated sulfuric acid. FW(H2SO4) = 98.086 Include unit symbol.
Write balanced net ionic equation for the reactions that take place when the following reagents are mixed together in aqueous solution:
Compounds with nearly identical molar masses often have very different physcial properties. Choose the compound with the lower value. Solubility in water: di-ethylether or 1-butanol. Why is it lower?
Which radioactive decay particle poses the greatest risk if it is external to the body? Why? 2- Which is safer, an isotope with a short half-life or one with a long half-life?
What types of intermolecular forces would you expect to exist among molecules of 1-butanol?
Sodium bicarbonate decomposes to form the final solid product sodium oxide. Using a balanced equation, you are to convert the grams of sodium bicarbonate, one number is 5.213, to moles.
The very dense metal iridium has a face-centered cubic unit cell and a density of 22.56 g/cm3. Use this information to calculate the radius of an atom of the element.
what concentration of substrate will give a velocity (v) of 62% of maximal velocity (Vmax)?
In the bromination of ethane (C2H6) reaction, one wants to produce 10.0 g of C2H5Br product. How many grams of C2H6 would be needed to react with excess Br2.
Rank the following bonds according to increasing polarity.
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