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A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.

asked Jan 22 in ThermoChemistry by BridgetteCul (2.3k points)

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1 answer 92 views

A chemistry student needs to calculate the equilibrium constant for the following reaction:2 H2O(g) ⇌ 2 H2(g) + O2(g)The student has the initial concentration of H2 and O2 as 0.25 M and the initial concentration of H2O as 1.00 M. After the system reaches equilibrium, the student measures the concentration of H2 as 0.10 M. Using this information, what is the value of the equilibrium constant, Kc, for the above reaction?

asked Jan 22 in Chemical reactions by MartyKindler (1.5k points)

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1 answer 125 views

What is the product formed by the electrophilic addition of HBr to propene? Provide the complete mechanism for the reaction.

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

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1 answer 86 views

A piece of metal with a mass of 15 grams initially at 25°C is placed in 50 mL of water at 80°C. After the metal has reached thermal equilibrium with the water, its temperature is 30°C. Calculate the specific heat capacity of the metal.

asked Jan 22 in ThermoChemistry by IsabellFrome (2.1k points)

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1 answer 98 views

A 50 mL solution of 0.1 M Cu(NO3)2 was electrolyzed for 20 minutes. During this time, a current of 0.5 A was passed through the solution. What is the final concentration of Cu2+ ions in the solution after the electrolysis?

asked Jan 22 in ElectroChemistry by CharmainHers (1.6k points)

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1 answer 84 views

A student is given a mixture of two unknown substances, one organic and one inorganic, and is asked to identify these compounds using mass spectrometry. Can you provide a step-by-step procedure using mass spectrometry to identify the two unknown compounds?

asked Jan 22 in Analytical Chemistry by RichieRedric (1.9k points)

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1 answer 79 views

Assuming a carbon-carbon double bond length of 1.33 Å and a carbon-hydrogen single bond length of 1.09 Å, what is the approximate bond length of a carbon-carbon triple bond in a molecule with a linear geometry?

asked Jan 22 in Physical Chemistry by AntwanBowie (2.0k points)

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1 answer 79 views

Assume a reaction has reached equilibrium in a 1-liter container. If the volume is now reduced to 0.5 liters, what is the effect on the equilibrium position of the reaction?

asked Jan 22 in Chemical equilibrium by MacLgq130601 (2.4k points)

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1 answer 87 views

A chemistry student wants to know how the concentration of reactants and products affects the equilibrium constant of a chemical reaction. They decide to investigate the reaction between nitrogen gas and oxygen gas to form nitrogen dioxide gas, and the equilibrium constant Kc for this reaction. What is the relationship between the concentration of reactants and products and the equilibrium constant for this reaction, and how can this be explained by Le Chatelier's principle?

asked Jan 22 in Physical Chemistry by MaribelLeepe (1.7k points)

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1 answer 51 views

Calculate the corrosion current density for a steel pipe of diameter 10 cm and length 20 m, which is exposed to a 0.1 M HCl solution. The corrosion potential of steel in the given environment is -0.5 V (SHE), the Tafel slope is 0.12 V/decade, and the temperature is 25°C. Consider the density of steel to be 7.86 g/cm³ and the flow rate of the solution to be 5 L/min.

asked Jan 23 in ElectroChemistry by IsabellFrome (2.1k points)

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1 answer 124 views

What spectroscopic technique can be used to distinguish between two organic compounds with similar molecular formula but different functional groups?

asked Jan 21 in Organic Chemistry by Dawn49061396 (2.1k points)

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1 answer 167 views

How does the biological theory explain human behaviour?

asked Jan 20 in Psychology by CorrinePerre (2.1k points)

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1 answer 124 views

What is the product of the following rearrangement reaction? CH3-C(CH3)2-CH2OH → ?

asked Jan 21 in Organic Chemistry by MollieBalke (2.3k points)

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1 answer 92 views

A chemistry student is asked to determine the effect of temperature and pressure on the equilibrium of the reaction: 2NO2(g) ⇋ N2O4(g) using Le Chatelier’s principle. The initial concentration of NO2(g) is 0.5 mol/L and the reaction is carried out at 25°C. How will the equilibrium shift if the temperature is increased to 100°C and the pressure is decreased to 0.5 atm?

asked Jan 22 in Chemical reactions by RodolfoKello (2.0k points)

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1 answer 89 views

A chemistry student needs to determine the standard enthalpy change for the formation of NH3(g) from its constituent elements, using Hess's Law calculations. The student is given the following information:ΔHf°(NH3) = -46 kJ/molΔHf°(N2) = 0 kJ/molΔHf°(H2) = 0 kJ/molΔH298°(N2H4) = 95 kJ/molΔHf°(N2H4) = 50 kJ/mol2NH3(g) + N2H4(l) → 3N2(g) + 4H2(g)What is the value of ΔHf° for NH3, based on the above data?

asked Jan 22 in ThermoChemistry by MichelleHall (2.0k points)

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1 answer 124 views

What is the major product formed when 1-bromo-2-methylcyclohexane is treated with sodium ethoxide in ethanol at a temperature of 60°C?

asked Jan 21 in Organic Chemistry by RachelMcCann (2.2k points)

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1 answer 90 views

A chemistry student needs to determine the new equilibrium concentration of a complex ion, if the temperature is increased by 10°C from the initial temperature of 25°C, and the equilibrium constant for the reaction is 0.056. The initial concentration of the reactants are: [Fe3+] = 0.025 M, [SCN-] = 0.015 M, and [FeSCN2+] = 0.007 M.

asked Jan 22 in Chemical equilibrium by EdwinStambau (2.4k points)

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1 answer 97 views

A 5 g sample of a mixture containing sand and salt is dissolved in water. The solution is filtered, and the sand is collected and dried. The dried sand has a mass of 3 g. Using mass balance calculations, determine the percentage of salt in the original mixture.

asked Jan 22 in Analytical Chemistry by TammiTolbert (2.1k points)

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1 answer 124 views

What is the reaction mechanism for the nucleophilic substitution of chloroethane with aqueous sodium hydroxide? Provide the balanced equation, steps involved, and identify the products formed.

asked Jan 21 in Organic Chemistry by MarkusOrdone (1.9k points)

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1 answer 97 views

A 15.0 g sample of a mixture containing sodium chloride and sodium nitrate is dissolved in water, and then silver nitrate is added until no more precipitation occurs. The mass of the precipitate is found to be 20.4 g. What is the mass percentage of each component in the mixture?

asked Jan 22 in Analytical Chemistry by AlishaGuy35 (2.5k points)

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