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To what general class of mechanisms does the attack of bromide ion, Br-, on the cyclic bromonium ion(bridged bromonium intermediate of E-stilbene) belong? Does this ring-opening step follow first or
Small spheres of equal mass are made of lead (density =11.3 {rm g}/{rm cm}^{3}), silver (10.5 {rm g}/{rm cm}^{3}), and aluminum (2.70 {rm g}/{rm cm}^{3}). Without doing a calculation, list the sphe
The boiling point of a solution containing 10.44 g of an unknown nonelectrolyte in 50.00 g of acetic acid is 159.2°C. What is the molar mass of the solute?
A certain first-order reaction () has a rate constant of 6.60×10-3 at 45 . How many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
If the volume of the balloon can vary according to external conditions, what volume would it occupy at an altitude at which the temperature is -40°C and the pressure is 0.031 atm?
The density of diamond is 3.63 g/cm3 and the density of lead is 11.0 g/cm3. If equal masses of diamond and lead are transferred to equal volumes of water in separate graduated cylinders, which
The following ions contain the same number of electrons. Rank them in order of decreasing ionic radii. Rank from largest to smallest radius. To rank items as equivalent, overlap them. NA+ F- 02- Al3+
An experiment requires 42.0 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder
The density of carbon in the form of diamonds is 3.51 g/cm^3. If you have a 40-carat spherical diamond, what is the diameter of the diamond in millimeters?
What is the theoretical mass of xenon tetrafluoride that should form when 130 g of xenon is reacted with 100 g of F2? What is the percent yield if only 145 g of XeF4 is actually isolated?
How many moles of sodium are there in 2.5 moles of Na3PO4 and what would the process be for finding the weight of SO2 that would contain 1.9g of Oxygen
An empty beaker weighs 41.19 g. When it is completely filled with water (density = 1.0 g/mL), the beaker weighs 92.92 g.
What is the molar mass of the gas in a glass bulb with a volume of 2.50 L at a temperature of 22 degrees C and a pressure of 110 mm Hg. The gas weighed 505 mg.
The average volume of air for each breath is 505 cm3 at 20.0 degrees Celsius and 9.95 times ten to the fourth Pa. What is the volume of the air at STP that an individual breathes in one day?
A furniture factory needs 31.5 ft2 of fabric to upholster on a chair. Its Dutch supplier sends the fabric in bolts of exactly 200 m2. What is the maximum number of chairs that can be upholstered by
Describe the hybrid orbitals uses by the central atom and the types of bonds formed in I3-.
Calculate the equilibrium concentrations of CH3Cl, CH3OH , OH- and Cl- in a solution prepared by mixing equal volumes of 0.1 M CH3Cl and 0.6 M NaOH.
What is the standard heat of formation of methane CH4 as calculated from the data above?
If 100.0 grams of copper (Cu) completely reacts with 25.0 grams of oxygen, how much copper(II) oxide (CuO) will form from 140.0 grams of copper and excess oxygen? (Note: CuO is the only product of t
Write the structures of the organic products that will be formed when methyl benzoate is treated with lithium aluminum hydride and the reaction mixture is worked up with aqueous acid.
What is the empirical formula of a compund with the molecular formula N2 O4
How many moles of chromium metal are needed to produce 855 g of chromium(III) phosphate? The reaction of 206 g chromium will release how many moles of hydrogen gas?
An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. What is the molarity of silver nitrate in the solution?
If a bottle of nail polish remover contains 172 of acetone,how much heat would be released by its complete combustion? The density of acetone is 0.788
A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece. How many kilograms of dietary fat are in a box containing 3.00 lb of candy?