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Estimate the heat released when ethene CH2 CH2 reacts with hydrogen gas to give CH3CH3. Bond enthalpies areC H : 412 kJ/mol; C C : 348 kJ/mol;C C : 612 kJ/mol; C Br : 276 kJ/mol;H H : 436 kJ/mol.
In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed.
If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 748 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)→ 2K2O(s) + 2N2(g) + 5O2(g)
For the reaction 2C6H6 + 15O2 → 3CO2 + 6H2O 30 grams of C6H6 are allowed to react with 79.09 grams of O2.
Energy of visible photos and breaking of the bond in AgI, The silver iodine bond energy is approx 255kJ/mol. (AgI is one of the active components in photograpgy sunglasses.)
consider a major oil spill in a lake ( a prototype situation related to Alaska Oil Spill few years ago and many subsequent spills) Amount of oil spilled is 2.9 mega gram (Mg).
Suppose that 0.82 g of water condenses on a 80.0 g block of iron that is initially at 24 C.If the heat released during condensation goes only to warming the iron block
calculate the difference in mass that is hold by a 500.0mL flask at a temperature of 0.0°C from that at temperature of 20.0 °C? (you can assume the volume of the sample at 0.0 °C temperature =volume of the sample at 20.0°C)
If a gas is collected over water at 30.0oC in a 50.0 ml container and the pressure of the "wet" gas is found to be 645 torr, what would the pressure of the "dry" gas be in the same container and temp.
Pressure in a manometer, A manometer consists of a U-shaped tube containing a liquid. One side is connected to the apparatus and the other is open to the atmosphere
Determine the mass percent of CH3COOH in this solution if density of vinegar is 1.01 g/mL? Also calculate mole fraction of acetic acid in this solution and molality of this solution?
The international unit for weighing diamonds and determine the volume of a 0.76 carat diamond if The density of diamond is given=3.51 g/cm3 ?express your answer in units of cm3
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