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Calculate the density of Helium, He, in grams per liter at 21 degrees C and 752 mmHg. The density of air under these conditions is 1.188 g/L. What is the difference in mass between 1 liter of air...

A vessel containing 39.5 cm3 of helium gas at 25 degrees C and 106kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure...

I need help with these questions:   1. Use the reaction that occurs when magnesium burns in oxygen to show how a reaction might be included in more than one category of reaction.   2...

Can anyone help me with this problem? I can't get the answer, there must be something wrong in my reasoning, thank you so much!   "Calculate the pH of a solution obtained by adding...

The rate of reaction in terms of the "rate law expression" includes the rate constant (k), the concentration of the reactants, and the orders of the reaction with respect to the different...

The rate of the reaction in terms of the "disappearance of reactant" includes the change in the concentration of the reactant, the time interval, and the coefficient of the reactant. Consider...

Calculate how many cm^3 of a solution of perchloric acid 55.0% ( density = 1.47 g/mL) must be diluted with water in order to prepare a 0.5 L 0.3 M solution. How much water do we have to add in order...

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