Determine the heat of reaction value
The first step in the industrial production process is the oxidation of ammonia:
4 NH3 (g) + 5 O2 (g) yields 4 NO (g) + 6H2O (g). Determine the Heat of Reaction values:NH3 (g) = -45.9kJ; O2 (g) = 0 kJ; NO (g) =90.3 kJ; H2O (g) = -241.8 kJ
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Determine the age of a rock whose 40Ar/40Kratio is 1.25?(The half-life of 40K is 1.28 109years.) and calculate the age of a rock whose 40Ar/40Kratio is 1.25 where the half-life of 40K is 1.28 times 109years.
A propellant for rockets is obtained by mixing dinitrogentetroxide N2O4 and the liquids hydrazine N2 H4. These components react to give water vapor and nitrogen gas N2, evolving 1049 kJ of heat at constant pressure when 1 mol of N2O4 reacts
The monthly sales at the computer store have the mean of $25,000 and standard deviation of $4,000. Profits are 30% of sales less fixed costs of $6,000.
A paired-difference experiment dealing with the response latencies for noise detection under two conditions used a sample of twelve 9-month-old children and reported a sample mean difference of 70.1 and standard deviation of 49.4 for the differenc
Determine the numbers of square kilometers of ocean will be covered by the 1 barrel of oil? If the 1barrel is equal to 31.5 gallons and the oil creates a film of 100nm thick on water.
Assume that we would like to calculate a 99% confidence interval for unknown mean range, µ, of bats using the data in.
A balloon which is having 5.41 dm3 of helium, He at the 24o C and 101.5 kPa. Assume the gas in the balloon is heated to 35o C. If the He gas is now 102.8 kPa, estimate the new volume of the gas?
The resulting Na2 C 2O4 precipitate was filtered and dissolved in the dilute H2SO4 .This solution needed 2.05 mL of 4.88 X10-4 M KMnO4 to reach the end point.
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