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A chemistry student needs to find the percent composition of a compound with the empirical formula CCl. The compound has a molar mass of 98.96 g/mol. What is the percent composition of this compound?

asked Jan 22 in Inorganic Chemistry by RenaCastella (1.7k points)

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1 answer 110 views

A chemistry student is provided with a mixture of two chemicals, A and B, but the quantity of each chemical is unknown. The student uses mass balance calculations to determine the mass of each component in the mixture. Chemical A has a molecular weight of 100 g/mol, while chemical B has a molecular weight of 120 g/mol. If the mixture contains 10% more of chemical A by mass than chemical B, what is the mass of each component in the mixture?

asked Jan 22 in Analytical Chemistry by MatthewStore (1.3k points)

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1 answer 73 views

Based on the intermolecular forces present in a substance, predict which substance would have a higher boiling point: methane or ethane?

asked Jan 23 in Chemical bonding by EffieQkd6688 (1.7k points)

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1 answer 104 views

A gas-phase reaction A ⇌ B is known to have a rate constant of 0.05 L/mol/s at 300 K. If the initial concentration of A is 0.1 M and the system reaches equilibrium after 2 minutes, what is the concentration of B at equilibrium? (Assume constant pressure and ideal gas behavior)

asked Jan 22 in Physical Chemistry by RemonaPinto (1.8k points)

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1 answer 69 views

Calculate the change in Gibbs free energy for the reaction between hydrogen gas and iodine gas that forms hydrogen iodide gas. The balanced equation is as follows:H2(g) + I2(g) → 2HI(g)Assume a temperature of 298 K and use the following standard molar free energy of formation values:∆Gf° (HI) = -17.4 kJ/mol∆Gf° (H2) = 0 kJ/mol∆Gf° (I2) = 0 kJ/mol

asked Jan 23 in Chemical thermodynamics by AundreaWhitf (1.8k points)

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1 answer 65 views

Calculate the enthalpy change for the hydrolysis of 0.1 moles of sucrose in water given the following information: - The enthalpy change of the reaction is -564 kJ/mol.- The molar mass of sucrose is 342.3 g/mol.- The reaction is exothermic.

asked Jan 23 in ThermoChemistry by MatthewStore (1.3k points)

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1 answer 72 views

Calculate the amount of heat required to melt 50 grams of ice at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by FelixTolmer3 (1.9k points)

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1 answer 68 views

Calculate the effect of adding a catalyst on the equilibrium position of the following redox reaction: Fe2+(aq) + H2O2(aq) + 2H+(aq) ⇌ Fe3+(aq) + 2H2O(l) If a catalyst is added to the reaction mixture, what will be the new equilibrium constant (Kc)? And how will the addition of a catalyst affect the value of Kc?

asked Jan 23 in Chemical equilibrium by LorrineA1626 (1.6k points)

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1 answer 116 views

What is the pH of a solution that contains 0.1 M hydrochloric acid, HCl?

asked Jan 22 in Inorganic Chemistry by NicholeBueno (1.8k points)

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1 answer 69 views

Calculate the change in enthalpy for the following chemical reaction: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) Given that the enthalpies of formation for CH4(g), CO2(g), and H2O(l) are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol respectively.

asked Jan 23 in Chemical reactions by ZKLBarbra368 (2.3k points)

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1 answer 56 views

Calculate the equilibrium concentration of each species (in mol/L) in a system containing 0.200 M KI and 0.200 M Cl2 that forms KCl and I2 at equilibrium, given that the equilibrium constant (Kc) is 9.0 x 10^-2 at a certain temperature.

asked Jan 23 in Chemical equilibrium by Wilbur29087 (1.8k points)

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1 answer 69 views

Calculate the cell potential for the following electrochemical reaction: Cu(s) + 2 Ag+(aq) → Cu2+(aq) + 2 Ag(s) The standard reduction potentials are: Cu2+(aq) + 2 e- → Cu(s) E° = 0.34 V Ag+(aq) + e- → Ag(s) E° = 0.80 V

asked Jan 23 in ElectroChemistry by FinleySalern (1.6k points)

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1 answer 67 views

Calculate the enthalpy change for the combustion of methane gas if the standard enthalpies of formation of CH4(g) and H2O(l) are -74.8 kJ/mol and -285.8 kJ/mol, respectively.

asked Jan 23 in Chemical thermodynamics by TarenSalmond (1.8k points)

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1 answer 101 views

A student mixed 10 grams of iron and 15 grams of oxygen to produce iron oxide. What is the limiting reactant and what is the mass of the iron oxide produced? (Assume all reactions are complete)

asked Jan 22 in Chemical reactions by BradCoz53277 (1.9k points)

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1 answer 144 views

Identify the number of stereoisomers possible for the following compound: 3-chloro-2-hydroxybutanoic acid.

asked Jan 21 in Organic Chemistry by MeredithFeg5 (1.6k points)

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1 answer 69 views

Calculate the bond order and bond length of the O-O bond in hydrogen peroxide (H2O2)? Show your work and explain your reasoning.

asked Jan 23 in Inorganic Chemistry by BrentAshcrof (1.5k points)

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1 answer 68 views

Calculate the corrosion potential of a copper metal electrode in a 0.1 M CuSO4 solution at 25°C, given that the standard reduction potential of Cu2+/Cu is +0.34 V.

asked Jan 23 in ElectroChemistry by JackQ7308746 (2.0k points)

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1 answer 72 views

Calculate the activation energy for the reaction between hydrogen gas and iodine gas to form hydrogen iodide, given that the rate constant at 25°C is 4.2 × 10^-4 L/mol.s and the frequency factor is 1.5 × 10^12 s^-1.

asked Jan 23 in Chemical reactions by ScarlettRobb (1.7k points)

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1 answer 143 views

What is the IUPAC name of the compound with the molecular formula C5H8, which contains a triple bond between the second and third carbon atoms of the carbon chain?

asked Jan 21 in Organic Chemistry by AlishaGuy35 (2.5k points)

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1 answer 101 views

A student is asked to design a distillation column for the separation of a mixture consisting of ethanol and water. The student has to determine the number of theoretical plates required for the column to achieve a product concentration of 95% ethanol, given the feed mixture contains 25% ethanol and 75% water. The student also needs to calculate the amount of steam required for the reboiler to operate at a reflux ratio of 3.5, assuming the total condenser efficiency is 100%.

asked Jan 22 in Chemical engineering by JonasQuj2910 (2.1k points)

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