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-If you were sitting near a gram of protactinium-234 and a gram of uranium-234, both solid materials, which would you consider more dangerous to you? Explain giving two reasons.
-A scientist claimed that he radiocarbon dated a fossilized skull of a dinosaur and found it to be about 63 million years old. Do you support his claim? Provide at least one scientifically based reason why you do or do not support the claim
- Explain why radiocarbon dating is not 100% accurate. What are the sources of some of this inaccuracy
Calculate the change of entropy for the system when 2.00 moles of a diatomic ideal gas is changed from 25 degrees celsius and 1.5 atm to 135 degrees Celsius
a solution is prepared by dissolving 297 g of sucrose c12h22o11 in 624 g of water. what is the vapor pressure of this
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines
Regard as the chemical reactions taking place during the electrolysis experiment, explain which observations should you expect to see
If the pressure of gaseious chloroform in a flask is 195 mm Hg at 25 degrees celsius and its density is 1.25 g/l, what is the molar mass of chloroform?
What would you do if you spilled a small amount of hydrochloric acid on your hand?
aluminum hydroxide reacts with sulfuric acid. whichreagent is the limiting reactant when 0.700 mol of aluminumhydroxide
A solution is composed of ethanol and water. The solution density is 0.964 g/mL. The partial molar volume of ethanol and water is 52.0 mL/mol and 17.0 mL/mol respectively. What is the composition of liquid by mass
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175..
In the preparation of cyclohexanone from cyclohexanol the products contained a starting material impurity (cyclohexanol). Imagine that instead of utilizing pure cyclohexanone in the nitric acid oxidation of cyclohexanone to adipic acid you used on..
Based on the following equation, determine the mass of a 50.0mL sample of your salt solution. Report the mass as a number and use all lower case letters to spell out the word(s) in the unit(s).
Calculate the vapor pressure of a solution containing 25.3g of glycerin C3H8O3 in 125mL of water at 30.0C. The vapor pressure of pure water at this temperature is 31.8torr}. Assume that glycerin is not volatile and dissolves molecularly (i.e., it ..
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