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find the mass of C3H8 required to generate 2.5x10^8 KJ of energy when combusted with O2 gas to produce CO2 gas and water vapor.
Which one of the following molecules has tetrahedral geometry?
Determine the mass of the steel bar if the final temperature of the system is twenty one degree Celsius?
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
At a certain temperature the equilibrium pressure is .718 atm. Calculate Kp for the reaction
A typical aspirin tablet contains 325 mg of acetylsalicylic acid ( HC9H7O4). Calculate the pH of a solution that is prepared by dissolving five aspirin tablet(s) in one cup (237 mL) of solution. Assume the aspirin tablets are pure acetylsalicylic ..
How many moles of H+ (H3O+) are produced in 40.0 m of 0.025 M HCL?
The water level in a graduated cylinder initially at 221 rises to 271 after a piece of lead is submerged. What is the mass in grams of the lead?
Identifying and balancing the different types of chemical reactions. Evaluate which processes represent chemical reactions.
Citric acid (H3C6H5O7) is a product of the fermentation of sucrose (C12H22O11) in air. C12H22O11(aq) + 3 O2(g) -> 2 H3C6H5O7(aq) + 3 H2O(l) Determine the mass of citric acid produced when 4.60 mol C12H22O11 is used.
what is the volume of 1 mole of Helium gas when the pressure is 1.47 atm and the temperature is 287 K.
Given a restriction enzyme that has a concentration of 50 units/ml but your experiment requires that the concentration be reduced to 2.5 units/ml.
Estimate the magnitude of the absoulte error and percent error in the measured sample volumes. Compare those errors to the errors that occur when measuring volumes of approximately 8mL
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