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Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 26 C (about room tempera- ture)? The normal boiling point of benzene is 80 C and its molar heat of vaporization is 30.8 kJ/mol. Answer in units of atm.
A 5.5 g sample of metal at 100.0 degrees celsius is placed in a calorimeter with 20.0 g of water at 15.0 degree celsius. If the temperature of the water rises to 21.0 degrees celsius, what is the specific heat of the metal?
What is the percentage by mass of CH4 in the mixture. The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1 and -1569.7 kJ mol-1, respectively.
Which of the following reaction sequences can be used to prepare m-chloroaniline starting from benzene
A sample weighing 25g starts at 99 degrees celsius. It is put in a calorimeter containing 100g water. The water temperature begins at 20 degrees and both water and sample reach equilibrium at 32 degrees. What is the specific heat of the sample?
Add charges, single electron dots, and/or pairs of dots as appropriate to show the Lewis symbols for the most stable ion of each element. Treat as the valence shell in all cases. To add formal charges, click the button below (which will turn yello..
How many grams of titanium tetrachloride can be produced?
Consider a 53.5 g sample of H2O(g) at 117°C. What phase or phases are present when 134 kJ of energy is removed from this sample.
A solution containing an unknown amount of X and 10.25 mM of Y was run and gave peak areas of 8.20 and 6.50 cm2 respectively. What is the concentration of X in the unknown solution? What kind of standard is Y?
When one mole of hydrogen decomposes into H atom the change in enthalpy is 435. 88 kJ/mole. What is the formation enthalpy, ?Hf for hydrogen atom
A sample of methane (CH4) has a volume of 25 mL at a pressure of 0.80 atm. What is the volume of the gas at each of the following pressures if there is no change in temperature? a) 0.40 atm; b) 2.00 atm; c) 2500 mmHg; d) 80.0 torr.
The good professor accidently grabs the Na2HPO4 bottle. What pH did professor Whoops expect the solution to be. what was the actual pH of the solution as made
What region of IR spectrum (give a range in wave numbers) is most useful for distinguishing between isomers that contain the same functional groups
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