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what is the intermediate of the photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene ? Draw the structure of this nternediate, using wedge-and dash bonds to denote the appropriate stereochemistry.
A gas expands and does P-V work on the surroundings equal to 327 J. At the same time, it absorbs 121 J of heat from the surroundings. Calculate the change in energy of the gas.
At a temperature of 60 ºC, about 0.8 g CO2 can be dissolved in 100 g water. what would be the mass of CO2 which can be dissolved in 100 g water at 10 ºC?
a student titrates 0.738 grams of an unknown solid, weak acid with 0.1027 Molarity NaOH. What is the molecular weight of the unknown solid, weak acid?
A 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Upon cooling, the camphor freezes at 157.7°C. Calculate the molar mass of the unknown compound.
how many moles are present of an ideal gas at the following conditions: 1.0 atm, 25.0 C, and occupying 22.4 L, The Lewis structure for PF3 shows that the central phosphorus atom has _______ nonbonding and
Determine how many milliliters of this solution should you dilute to make 100.0mL of 0.250M Ammonia(NH3)?
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
Calculate the theoretical yield of iron in the reaction of 254 g of iron (III) oxide with 25.0 g of carbon, according to the equation 2Fe2O3(s) + 3C(s)> 4Fe(s) +3CO2(g)
How many grams of water can be cooled from 45c to 15c by the evaporation of 65g of water? (The heat of vaporization of water in this temperature range is 2.4kj/g. The specific heat of water is 4.18j/k*mol .)
A 35.00 mL sample of HNO3 solution is neutralized by exactly 42.63 mL of 0.4153 M KOH. What is the molarity of the HNO3 solution?
the barometer at an indoor pool reads 105 kpa. if the temperature in the room is 30 degrees Celsius, what is the pressure of the air
What is the pH of a buffer prepared by adding 180 mL of 0.100 M NaOH to 200 mL of 0.100 M acetic acid? (Ka for CH3COOH = 1.8 x 10-5)
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