Recent questions in Chemistry

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Given a sample of an unknown compound, use nuclear magnetic resonance (NMR) spectroscopy to identify the structure of the compound and determine the number and types of atoms in the compound's molecular formula.

asked Jan 29 in Analytical Chemistry by MOTHelene86 (590 points)

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1 answer 52 views

Determine the structure of an unknown organic compound using nuclear magnetic resonance (NMR) spectroscopy, given the following information: - The compound has a molecular formula of C6H12O2 - The NMR spectrum shows signals at 1.2 ppm (triplet), 2.3 ppm (quartet), and 3.7 ppm (doublet).

asked Jan 29 in Analytical Chemistry by SpencerRagga (290 points)

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1 answer 56 views

Determine the molecular formula of an unknown organic compound using mass spectrometry data.

asked Jan 29 in Analytical Chemistry by ShennaNolan4 (230 points)

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1 answer 59 views

Determine the concentration of lead in a water sample using atomic absorption spectroscopy.

asked Jan 29 in Analytical Chemistry by BeatriceSanm (270 points)

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1 answer 42 views

Calculate the mole fraction of each component and the total pressure of a gas mixture at 25°C and 2 atm that contains 0.5 moles of methane (CH4) and 0.2 moles of ethane (C2H6).

asked Jan 28 in Chemistry by RoseDelmonte (340 points)

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1 answer 61 views

Calculate the molar mass of magnesium nitrate [Mg(NO3)2].

asked Jan 23 in Inorganic Chemistry by Virgilio98Q (590 points)

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1 answer 38 views

Calculate the molar mass of barium nitrate (Ba(NO3)2).

asked Jan 23 in Inorganic Chemistry by PaulineF6290 (390 points)

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1 answer 54 views

Calculate the molar mass of ammonium sulfate ((NH4)2SO4), given that the atomic masses of nitrogen, hydrogen, sulfur, and oxygen are 14.01 g/mol, 1.01 g/mol, 32.06 g/mol, and 16.00 g/mol, respectively.

asked Jan 23 in Inorganic Chemistry by ElisaLukis98 (310 points)

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1 answer 54 views

Calculate the melting point of sodium chloride (NaCl) given that its enthalpy of fusion is 28.9 kJ/mol and its entropy of fusion is 41.3 J/K/mol.

asked Jan 23 in Inorganic Chemistry by NellyCorwin (420 points)

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1 answer 13 views

Calculate the melting point of aluminum oxide (Al2O3) given that its enthalpy of fusion is 326 kJ/mol and its entropy of fusion is 110 J/(mol*K). Assume standard pressure and temperature conditions (STP).

asked Jan 23 in Inorganic Chemistry by JefferyGoodl (310 points)

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1 answer 62 views

Calculate the melting point of a solution containing 20 g of benzoic acid (C6H5COOH) and 80 g of naphthalene (C10H8). The melting points of pure benzoic acid and naphthalene are 122.4 °C and 80.2 °C, respectively. The molal freezing point depression constant for naphthalene is 6.8°C/m.

asked Jan 23 in Physical Chemistry by RaquelGendro (230 points)

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1 answer 45 views

Calculate the melting point of a mixture of 1 mol of benzene and 2 mol of toluene, given that the pure components have melting points of 5.5 °C and -95.0 °C, respectively.

asked Jan 23 in Physical Chemistry by RileyLort122 (410 points)

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1 answer 54 views

Calculate the melting and boiling points of Sodium Chloride (NaCl) using the Clausius-Clapeyron Equation given that the heat of fusion for NaCl is 28.9 kJ/mol, the heat of vaporization is 163.0 kJ/mol and the standard entropy change for phase transition is 72.14 J/K/mol.

asked Jan 23 in Inorganic Chemistry by EdwardPersse (390 points)

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1 answer 54 views

Calculate the mass of sodium chloride (NaCl) produced when 2.5 moles of sodium (Na) react completely with excess chlorine gas (Cl2). (Hint: Use the balanced chemical equation 2Na + Cl2 → 2NaCl)

asked Jan 23 in Chemical reactions by TresaCole198 (170 points)

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1 answer 58 views

Calculate the mass of silver (Ag) that will be deposited on the cathode during electrolysis if a current of 2.5 A is passed through a solution of silver nitrate (AgNO3) for 3 hours.

asked Jan 23 in ElectroChemistry by AliF33136418 (270 points)

+1 vote

1 answer 61 views

Calculate the magnetic susceptibility of water molecule using Quantum Chemistry methods.

asked Jan 23 in Quantum Chemistry by TajPeyton117 (230 points)

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1 answer 66 views

Calculate the magnetic susceptibility (in cm3 mol-1) of a molecule with the following quantum numbers: S=1, L=2, and J=3/2 in the presence of an external magnetic field of 0.5 T.

asked Jan 23 in Quantum Chemistry by Dixie5711384 (490 points)

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1 answer 49 views

Calculate the magnetic properties (magnetic dipole moment, total angular momentum, and g-tensor) of a water molecule using quantum chemical methods and compare them with the experimental values.

asked Jan 23 in Quantum Chemistry by HomerWarrick (530 points)

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1 answer 53 views

Calculate the magnetic moment of the compound Ni(CO)4 using the crystal field theory and determine whether it is diamagnetic or paramagnetic.

asked Jan 23 in Inorganic Chemistry by Shana92O7082 (390 points)

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1 answer 61 views

Calculate the magnetic moment of Ni(CO)4 using the crystal field and molecular orbital theory.

asked Jan 23 in Inorganic Chemistry by EarlWeiland2 (390 points)

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