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A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its empirical formula?
In preparing solutions of the unknown acids, a much smaller mass of acid is used than in preparing an equal volume of KHP solution to achieve about the same concentration. Why is this
Determine the mass in grams of Ni in the original sample? Determine the weight percent of Ni in the sample?
An empty flask weighs 252.2 grams. When filled with water ( d= 1.00 g/cm3) the flask and its contents weigh 591.8 g)
The reading on a mercury manometer at 25 deg C (open to the atmosphere at one end) is 56.38 cm. The local acceleration of gravity is 9.832 m s-2.
If 0.80 g of sulfur dioxide at 10.00 atm pressure (P) dissolves in 5.00 L of water at 25.0°C, how much of it will dissolve in 1 L of water at 9.00 atm pressure (P) and the same temperature?
A 2.89-L flask is filled with propane gas (C3H8), at 1.00 atm and -23.0°C. What is the mass of the propane in the flask?
The combustion of 58.0 g of butane (C4H10) produces 158g of CO2. What is the percent yield of the reaction
Energy cannot be transformed from one type to another (e.g., potential to kinetic). 3. Matter can be transformed into energy in a chemical reaction. 4. Energy can be created spontaneously from nothing.
If 2.5 mol of ethylene oxide is decomposed at 93 degrees celcius what will be the final temperature of the products? The heat capacity of the products is 110.13J/mol C?
Rank each of the following measurements from smallest to largest
You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400. counts has diminished to 100. counts after 35.2 minutes, what is the half-life of this substance
What is the entropy change if two mole of liquid water is heated from 20 C to 100 C under constant pressure? Cp=75.5 J/mol*K over this temperature interval
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