Determining the speed of the proton
A proton in a linear accelerator has a de Broglie wavelength of 128 pm
What is the speed of the proton?
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The standard enthalpy of combustion of ethene gas [C2H4] is -1411.1 kJ/mol at 298 K. Given the following enthalpies of formation, calculate delta Hf (final enthalpy) for C2H4.
A 27.0 g sample of an unknown carbon-hydrogen compound was burned in excess oxygen to form 88.0 g of CO2. What is a possible molecular formula of the hydrocarbon?
A reaction occurs in a calorimeter that contains 120.0 g of water at 25.0°C, and 514.95 cal of heat is evolved. If the specific heat capacity of water is 1 cal/deg-g, what is the final temperature of the water?
In addition to the main product what are two side reactions that could occur in the experiment of The Diels-Alder Reaction of Cyclopentadiene with Maleic Anhydride.
How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
A 0.7549g sample of a pure hydrocarbon burns in oxygen gas to produce 1.9061g of carbon dioxide and 0.3370g of water. What is the empirical formula for the compound?
Calculate the pH at each point indicated when 100 mL of .100 M HF is titrated with .200 M KOH: a) before addition of KOH b) after .15 mL KOH c)after addition of 50mL KOH d) after addition of 75 mL KOH.
Hydrogen is produced when methane(CH4) reacts with water. The other product is CO2. Using 80.0g of methane and 16.3g of water, how many liters of H2 can be produced at STP? what is the limiting reactant?
An empty flask has a mass of 123.4 g. When the flask is filled with water, the mass is 211.6 g. If 10.0 g of zinc. what is the new mass of the flask?
Calculate w and ?U when 1 mole of xenon gas assumed ideal under goes adiabatic expansion from 27?c to 127? assuming(heat capacity of constant volmue=12.5)
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