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A gas is confined to a cylinder under constant atmospheric pressure P. When the gas undergoes a particular chemical reaction, it releases 79 kJ of heat and does 18 kJ of PV work on its surroundings. What are the values of ?H and ?E for this process? Explain and show any necessary calculations
calculate the theroretical yield of c2h5cl when 123 g of c2h6 reacts with 220 g of cl2 assuming that c2h6 and cl2 react
A bottle containing 350 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
1-Napthaleneacetic acid is not soluble in water at room temperature but goes into solution readily when heated.
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?
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295k and volume of hydrogen gas collected was 35.6 mL.
Molecular orbital templates for diatomic molecules from the 2nd period elements are attached to the back of the exam. Use the appropriate diagram to determine the bond order in the O2+ ion.
What reagents would you recommend and what mass of each one would you use to match the concentrations of Na+, Cl-, Mg2+, Ca2+ and SO42- given in the table above?
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
As a demonstration, an instructor had a block of ice suspended between two chairs. She then hung a wire over the block of ice, with weights attached to the ends of the wire.
A 5 g antacid tablet listing aluminum hydroxide, Al(OH)3, as its active ingredient requires 138.60 mL of 0.1111 M hydrochloric acid to neutralize via titration. What is the percent (w/w) of aluminum hydroxide in the tablet
Aqueous solutions of chromium(III) chloride and lithium hydroxide react to give aqueous lithium chloride and a chromium(III) hydroxide precipitate.
A dioxin-contaminated water source contains 0.081% dioxin by mass. How much dioxin is present in 4.2 L of this water? (Assume that the density of the solution is 1.01 g/mL.)
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