Energy for the decomposition
The activation energy for the reaction O + O3 ? 2O2 is 25 kJ/mol, and the enthalpy change is ?H = -388 kJ/mol. What is the activation energy for the decomposition of O2 by the reverse reaction
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Calculate the concentration (M) of sodium ions in a solution made by diluting 70.0 mL of a 0.274 M solution of sodium sulfide to a total volume of 400 mL.
Determine whether this is a probability distribution. If not, identify the requirement that is not satisfied.
If all the energy obtained from burning 1.28 pounds of butane(fuel value is 10.85Kcal/g) is used to heat 123.0kg of water at an initial temperature of 18.7 C, what is the final temperature?
An experiment shows that a 249 -mL gas sample has a mass of 0.433 g at a pressure of 750 mm Hg and a temperature of 29?. What is the molar mass of the gas?
If Mendel's theory is correct, find the mean and standard deviation for the numbers of yellow peas in such groups of 580 offspring peas.
What are the molecular (formula) masses of the following substances? Express your answer using one decimal place.
What must be added to 5/14 of 7/35 to make the sum equal to 7/3 of 1/21 ? Please solve it without using "x factor ".
If the total pressure in the flasks is 306 torr after the stopcock is opened, determine the intial pressure of N2 in the 1.00 L flask?
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