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The decomposition of N2O to N2 and O2 is a first order reaction. At 730 degrees Celcius the half-life of the reaction is 3.58x10^3 min. If the initioal pressure of N2O is 2.10 atm at 730 degrees Celcius, calculate the total gas pressure after on half-life. Assume the the volume remains constant.
the temperature of a 2.0 liter sample of heluim gas at STP is increased to 27 celsius and the pressure is decreased to 80.0 kPa. what is the new volume of the helium sample.
What is the molecular geometry around a central atom that is sp3 hybridized and has one lone electron-pair? a.bent, b. linear, c.trigonal-planar
Description of Lipids 1) What are the ingredients of a cephalin? 2) Which fatty acid is always unsaturated in a cephalin? Why?
After the Ketone react with sodium borohydride in ethanol. HCl be added dropwise, and then remove the ethanol by distillation, then add DCM and ice water.
calculate the equilibrium pressure of N2O4(g) and NO2(g). (c) What percentage (by moles) of the original N2O4(g) is dissociated at the new equilibrium position (total pressure = 1.00 atm)?
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained. Determine the simplest formula of the compound X.
To find the % by mass of a compound in a given sample - Determine the percent by mass of calcium carbonate in the sample. State any assumptions.
How many grams of sodium ion Na+ are in 2.50 g toothpaste. A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent
Diethyl amine density (1.0475 g/mL) Diethyl amine MW 73 Diethyl ether density (0.714 g/mL) Hint: Consider at which temperature the reaction is run. Which of the boiling points and melting points might come into play?
If 4.10 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
When M2S3(s) is heated in air, it is converted to MO2(s). A 4.500-g sample of M2S3(s) shows a decrease in mass of 0.209 g when it is heated in air. What is the average atomic mass of M.
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