What are the values for the spin-angular-momentum and the orientation of the spin- angular-momentum for a ground-state hydrogen electron? Sketch a picture to display the electron orientation.
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A battery is constructed based on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+ are 1.1×10−4 M and 1.6 M , respectively, in 1.0-liter half-cells.
PART A: What is the initial voltage of the battery?
PART B: What is the voltage of the battery after delivering 4.7 A for 8.0 h ?
PART C: How long can the battery deliver 4.7 A before going dead?
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What is the amount of Na2HPO4 you need to add to a solution of
25mg NaH2PO4 in 100ml water
to obtain a pH=7.95?
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At SATP, Ethanol (C2H6O) is a liquid that has a density of 0.789 g/cm3 and a Gibbs energy of formation Gf =-174.78 kJ.mol-1 Use this information to calculate the chemical potential of ethanol at 298 K and 10.0 bar pressure assuming that the liquid volume is pressure-independent.
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Reagent Data Table. Fill in the missing values for each entry.
[4] note: if you were unable to determine the yield, you must give an example yield calculation
Table 1. Reagent and Yield Data for the synthesis of butyl acetate from cesium acetate.
Compound Amount MW (g/mol) mmoles Stoichiometry/Comments
acetaminophen 350 mg
ethyl iodide 300 µL
(d = g/mL)
NaOEt 2.6 mL
ethanol 2 mL
phenacetin product obtained: 0.0175 g
crude product yield1 =
recrystallized yield1 =
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What is the pH of a solution made by adding 100g of sodium acetate to 500mL of water?
please answer in detail ,
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Calculate ΔrxnS, ΔrxnH, and ΔrxnG at 298Kfor the reaction below:
2 C3H6 (g) -----------------> C2H4 (g) + C4H8 (g)
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What is the change in enthalpy (in kJ) under standard conditions when 200.18 g of sodium sulfate dissolves in water?
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Given the following thermochemical equations:
X2+3Y2 equals 2XY3 and Delta H =-340 kJ
X2+2 Z2 equals 2XZ2 and Delta H = -170 kJ
2Y2 + Z2 equals 2Y2Z and Delta H=-260kJ
Calculate the change in enthalpy for the following reaction
4XY3+7 Z2 equals 6Y2Z+4XZ2
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draw vsepr and valence bond picture for C2H2? label the bonds. for each sigma bond name the two orbitals that overlap to form it? for each pi bond name the two orbitals that overlap to form it. why are to pi ponds perpindicular to each other. why are quadruple bonds unlikely? Please label thank you.
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A 0.4627 g sample of pewter, containing tin, lead, copper, and zinc, was dissolved in acid. Tin was precipitated as SnO2·4H2O and removed by filtration. The resulting filtrate and washings were diluted to a total volume of 200.0 mL. A 20.00 mL aliquot of this solution was buffered, and titration of the lead, copper, and zinc in solution required 34.11 mL of 0.001500 M EDTA. Thiosulfate was used to mask the copper in a second 25.00 mL aliquot. Titration of the lead and zinc in this aliquot required 34.45 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a third 30.00 mL aliquot. Titration of the lead in this aliquot required 24.39 mL of the EDTA solution. Determine the percent composition by mass of each metal in the pewter sample.
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Complete the mechanism of the following Diels-Alder reaction by drawing the curved arrows for the concerted reaction and the final product formed.
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In: Chemistry
A 0.8027 g sample of impure al2(CO3)3 decomposed with HCL: the
liberated CO2 was collected on calcium oxide and found to weight
0.0507g calculate the percentage of aluminum in the sample
In: Chemistry
A solution of 0.172 M NaOH is used to neutralize 27.0 mL of a H2SO4 solution.
Part A
If 30.6 mL of the NaOH solution is required to reach the
endpoint, what is the molarity of the H2SO4 solution?
H2SO4(aq)+2NaOH(aq)→2H2O(l)+Na2SO4(aq)
Express your answer with the appropriate units.
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Enter your answer using dimensions of chemical concentration
In: Chemistry