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Limonene (MW 136) is a pleasant-smelling liquid found in lemon and orange peels. The bp of limonene is 175ºC, but it co-distills with water at 97.5ºC. If the vapor pressure of water at 97.5ºC is 690 mm Hg, what percentage of steam-distillate is limonene?
A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: , 265 ; , 134 ; and , 159 . The mixture also contains helium gas. What is the partial pressure of the helium gas?
How many milliliters of 0.220M Na2S2O3 solution are needed for complete reaction with 2.401g of I2 according to the equation below. I2(aq)+2S2O3^2-(aq)------>S4O6^-2(aq)+2I-(aq)
Calculate the amount of energy released when 8.02g of Hydrogen reacts with excess Oxygen.
A substance with the empirical formula C2HCl has the molar mass of 181.44 g/mol. Find the molecular formula of this compound
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 2-methyl-2-butanol as the MAJOR product
a 100-rm w lightbulb is placed in a cylinder equipped with a moveable piston. the lightbulb is turned on for
Given 6.4 mL of sulfuric acid (98%) calculate the number of mmols. (MW H2SO4: 98.08 g/mol, density: 1.840 g/mL)
The mixture had an observed specific rotation of +15.3 degrees. If it is known that the specific rotation of the R enantiomer is -30.8 degree, determine the percentage of each isomer in the mixture.
How many milliliters of 4.21 M NaOH are needed to completely neutralize 76.9 mL of 0.340 M H3PO4?
A sample of compound B having an unknown concentration is measured to have an absorbance of 0.90 in a 1.00 cm path length cell at 500 nm. What is the concentration of B in this sample, assuming Beer's Law holds
A gas cylinder that contains argon has an internal volume of 6.88 L. A pressure gauge attached to the cylinder reads 1810 psi
A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent. One tube contains 125 toothpaste.
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