Calculate the concentration of sodium ions
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.
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A few minuteslater, after traveling 100 feet east, the angle of depression tothe same landmark is determined to be 61°. Use this information to determine the height of the balloon.
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If a person is randomly selected, find the probability that his or her birthday is October 18, which is National Statistics Day in Japan. Ignore leap years.
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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?
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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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