Calculate the molar mass of the unknown gas
The mass of an evacuated 255ml flask is 143.187g. The mass of the flask filled with 267torr of an unknown gas at 25*C is 143.289g. Calculate the molar mass of the unknown gas.
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Question: Consider the following reaction: CH3-Cl + I- ? CH3-I + Cl- Suppose we start the reaction with an initial concentration of CH3-I of 0.260M. Over a period of 1 hr 20 min, the concentration increases to 0.840M. What is the rate of the react
Question: A saturated aqueous solution of calcium hydroxide is approximately 0.13% calcium hydroxide, by mass, and has a density of 1.02 g ml^-1. What is the pH of such a solution?
A stock solution is prepared by adding 15 mL of 2.5 M Ba(CN)2 to enough water to make 20 mL. What is the CN- concentration of 5 mL of the stock solution?
The hydrocarbon contains 93.75% carbon and 6.25% HYDROGEN. Calculate its empirical formula.
Microsoft access, Imagine that you work for a police department and have need to track the following type of data, parolees being released into the community. Create a database with at least one tabl
Calculate the percent by mass of the solute in each of the following aqueous solutions.
Calculate the molalities of the following aqueous solutions.
Calculate the molarity and the molality of an NH3 solution made up of 27.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL.
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