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If 62.0 mL of H2 and 62.0 mL of ethylene (C2H4) are allowed to react at 1.5 atm, the product ethane (C2H6) has a volume of 62.0 mL. Calculate the amount of PV work done, and tell the direction of the energy flow. C2H4(g) + H2(g) --> C2H6(g)
The mass of an average blueberry is 0.72 g and the mass of an automobile is 1900 kg. Find the number of automobiles whose total mass is the same as 1.0 {rm mol} blueberries.
you have a 550 ml tank of gas with a pressure of 1.56 atm at 24.0degc. you thought the gas was pure carbon monoxide but
A hydrogen-filled balloon was ignited and 2.00 gram of hyrdogen reacted with 16.0 g of oxygen. How many grams of water vapor were formed?
The half-life of a certain radioactive element is 1250 years. What percent of the atoms remain after 7500 years?
Based on the notion of weak and strong acids and bases, which of the following three actions would you expect to produce the largest ( most negative) ΔHneut. the smallest ΔHneut
Determine the concentration of calcium and chloride in the solution in both mg/L and mmol/L. You will need to find the molecular weights on a periodic table.
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture?
A mole of photons in the blue visible region of the electromagnetic spectrum has an energy of 2.54 × 10 2 kJ/mol, calculate the frequency in s-1 of the photon.
A 4.50-g sample is burned, and 2.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
Propose a method to accurately measure the melting point of vegetable oil both before and after hydrogenation. Keep in mind that it will be too thick and greasy to insert in a capillary tube
if you mixed 100 ml of 0.1M KI with 100ml of 0.1M K2S2O8. How will you calculate the diluted (or "new") concentrations of them
if 489 mg gas occupies 249 mL at 80 degrees celcius and 745 mmHg of pressure, what is the molar mass of the gas.
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