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What is the change in internal energy (in J) of a system that releases 840 J of thermal energy to its surroundings and has 119 cal of work done on it? can you show work please the anser is -342
What mass of each will be present in the air assuming the liquid and vapor are in equilibrium? The vapor pressures at 300 K are 3.2 kPa, 13.1 kPa, and 0.23 kPa respectively.
The second is defined as the time it takes for 9,192,631,770 wavelenght of a certain transition of the cesium-133 atom to pass a fixed point.
What are the sources of error that could happen in the experiment of ''dumas method for determining the molecular weight of volatile liquids''
In the oxidation of ammonia to form nitrogen oxide; 4NH3 + 7O2 ---> 4NO2 + 6H2O, water is formed at an instantaneous rate of 42 mol L-1 s-1. A.) What is the normalized reaction rate? B.) At what
the double bond electrons will act as the nucleophile in the first step of the reaction. 2. the halide ion will act as the nucleophile in the second step of the reaction.
Hydrogen gas effuses at a rate 4.5 times that of an unknown gas under the same conditions. What is the molar mass (g/mol) of the unknown gas
What is the molarity of a solution made with 2.4g if LiOH (molar mass = 23.9g/mol) dissolved to make 1.5L of solution? I want to know how to set up the formula for this problem
Using the Nernst Equation, calculate the voltage for a concentration cell with: Cu (s)| 0.01 M Cu2+|| 1.0 M Cu2+| Cu (s)
Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks.
A secondary alkyl halide reacts with a weak nucleophile. The reaction will proceed via which of the following mechanisms? A) SN1 B) SN2 C) E1 D) E2 E) SN1 and E1
What molarity of aqueous calcium chloride solution can be expected to show the same conductivity as 0.0050 M aluminum sulfate at 12,500 units.
As a technician in a large pharmaceutical research firm, you need to produce 150.mL of a 1.00 M phosphate buffer solution of pH = 7.10. The pKa of H2PO4- is 7.21.
Consider the following reaction: A(g)= B(g)+C(g) Find the equilibrium concentrations of A, B, and C for each of the following different values of Kc. Assume that the initial concentration of A in ea
Consider the following reaction: HC2H3O2 (aq) + H2O (l) = H3O+ (aq) + C2H3O2- (aq) Kc=1.8*10^-5 at 25C If a solution initially contains 0.260M HC2H3O2, what is the equilibrium concentration of H3O+
Consider a solution that contains 66.0% R isomer and 34.0% S isomer. If the observed specific rotation of the mixture is -30.0°, what is the specific rotation of the pure R isomer
On prolonged heating with concentrated hydrochloric acid, 2, 2-dimethyl-1-propanol, a primary alcohol, reacts to give 2-chloro-2methylbutane. provide a stepwise mechanism for this reaction
If a pure R isomer has a specific rotation of -133.0°, and a sample contains 64.0% of the R isomer and 36.0% of its enantiomer, what is the observed specific rotation of the mixture
The enthalpy change when 1 mol methane (CH4) is burned is -890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g of wate
A tertiary alkyl halide reacts with a weak base and nucleophile. The reaction will proceed via which of the following mechanisms? A) SN1 B) SN2 C) E1 D) E2 E) SN1 and E1