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The density of a certain gaseous compound of nitrogen and oxygen is 2.00g/L at 297 K and 1.06 atm. What is the molecular mass of the compound? Its molecular formula? (atomic mass of N = 14.0, O = 16.0)
At what temperature in Celsius would the rate be 5.000 times faster than it is at 36.6 degrees Celsius for a reaction with an activation energy of 16,243 J/mol?
Solid thorium(IV) fluoride has a boiling point of 1680°C.What is the density of a sample of gaseous thorium(IV) fluoride at its boiling point under a pressure of 2.5 atm in a 1.7 L container?
The self-amplifying reaction in which neutrons produced by the fission of one nucleus would induce fission in other nuclei is called
A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?
Draw the Lewis structures for calcium carbonate and magnesium hydroxide.
you have two water samples. sample x has a volume of 750 ml and a temperature of 42c. sample y has a volume of 380 ml
A calibrated flask was filled to the 25.00 {\rm mL} mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined that the flask contained 19.7325 {\rm g} of alcohol
calculate the specific heat of a substance if a 35 gram sample absorbs 28 joules as the tempature is raised from 292 kelvin to 313 kelvin.
Calculate the molarity (mol/L) of Mn2+ when MnS is placed in a 0.0179 M (NH4)2S solution. The equation represents the solubility process.
Mg + 2HCl --> MgCl2 + H2 For a mass of 0.013 g Mg and 5.0 mL of 1.00 M HCl, in a flask with V = 140.612 mL at 23.5?C. Calculate the vapor pressure of H2 and vapor pressure of water.
A solution of NaOH(aq) contains 8.0 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C
The cooling water enters the condenser at 70°F and its temperature cannot increase more than 25°F as it passes through the condenser.
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