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The half life for the first order decomposition of N2O5 IS 2.05 X 10^4 s. How long does it take for the sample of N2O5 to decompose to 80%, 50%, and 20% of its initial value?
A solution of potassium chromate is prepared at pH 7.72. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
suppose a runner completes a 10k road race in 42 minutes and 21 seconds. what is the runners speed in miles per hour
Problem- Certain proteolytic enzymes react in alkaline solutions. One of these enzymes produces 1.8 micromoles of hydrogen ions per second in a 2.50 mL portion of a buffer composed of 0.25M NH3 and 0.20 NH4Cl. By how much will the concentration of..
Explain a sample of water (H2O) contain 8.75 mol of H atoms. Explain how many moles of O atoms does it contain
two determinations of the dissolved oxygen content of a 200 ml sample of water made five days apart gave 5.3 ppm and
consider a reaction in which ferric oxide is converted to iron and gaseous oxygen. if this reaction is only 83
A 2.90-mol of N2 occupies 75.0 L at 0.95atm and 26 deg Celsius. Explain what volume will be necessary to contain a mixture of 1.45 mol of N2 and 1.45 mol of O2 at the same pressure as well as temperature
1.9 moles of gas are in a flask at 21°C as well as 697 mmHg. Explain the flask was opened and 10.5g of gas X was added to the flask. If the pressure changed to 795 mmHg and the temperature of the mixture was 26°C in the flask.
The student then adds more water until the solution volume becomes 1.0 L Write the eqn for each large-extent B/L A/B rxn which occurred on making this mixture. Do this by starting with the rxn that involves the strongest B/L A with the strongest B..
A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
Explain what happens when a balloon with static electricity is brought next to a running stream of water. Why does this happen? Netties answer during class our instructor took a balloon and rub it against the TV monitor.
Problem- I need to write the mechanism for the synthesis of Nylon-6,6 from adipoyl chloride and 1,6-hexanediamine. I am fine with writing the first reaction that leads to the first "thread" of Nylon-6, 6 + HCL. But how do I go on from there? Does ..
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