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what mass of magnesium is required to produce enough gas to exert a partial pressure of .50 atm in a 50.0 mL flask at a temperature of 25.0 degrees celcius?
The heat of combustion of hexane is 995.0 kcal/mol. How much energy is released during the complete combustion of 453 grams of hexane ?
What is your sampling rate in ml/min if you collected, over a four hour sample
If a solution is made by mixing 20.0 mL 0.4 M NaCH3COO with 30 mL 0.4 M CH3COOH, calculate the pH of the solution? For acetic acid, K = 1.76 x 10-5
Hydrogen and iodine gases react to form hydrogen iodide gas. H2(g) + I2(g) → 2 HI(g) At a certain temperature and pressure 0.70 L of H2 reacts with 0.70 L of I2.
When 0.450kJ of heat is added to the gas, it expands and does 219J of work on the surroundings. What is the value of \Delta H for this process? Answer in units of kJ
if 11.2 L of N2 are reacted to form NH3 at STP, how many liters of hydrogen will be required to consume all of the nitrogen
A sample of helium gas has a volume of 241 mL at 0.83 atm. What pressure is needed to reduce the volume at constant temperature to 35 mL.
A student wants to prepare a dilute solution of iron (III) solution, . The student is provided with a stock solution of 0.800 +/- 0.001 M and a 100.00 +/- 0.008 mL volume trick flask since the experiment trquires about 80 mL of the dilute iron (II..
how many moles of oxygen are required to react completely with 5 mol C8H18?
What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa? Ka = 1.8 × 10-5
what is the concentration of chromium ion present in a 0.07092 M solution of potassium hydroxide in contact with a large excess of a precipitate
Calcium in a mineral was analyzed five times by each of two methods. Are the mean values significantly different at the 95% confidence level? Method1: 0.0271 0.0282 0.0279 0.0271 0.0275 Method2: 0.0271 0.0268 0.0263 0.0274 0.0269 Chemistry
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