Questions by LucyGreene29

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1 answer 30 views

Calculate the standard enthalpy change for the following chemical reaction involving solutions:2HNO3(aq) + Ba(OH)2(aq) → Ba(NO3)2(aq) + 2H2O(l)Given the following information:ΔHf° [HNO3(aq)] = -207.5 kJ/molΔHf° [Ba(OH)2(aq)] = -994.0 kJ/molΔHf° [Ba(NO3)2(aq)] = -537.5 kJ/mol

asked 2 days ago in Chemical thermodynamics

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1 answer 53 views

Calculate the enthalpy change of the following reaction: 2C(s) + 2H2(g) + 5O2(g) -> 2CO2(g) + 2H2O(l) Given the enthalpies of formation of CO2(g), H2O(l), and H2(g) are -393.5 kJ/mol, -285.8 kJ/mol, and -241.8 kJ/mol, respectively.

asked Jan 23 in ThermoChemistry

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1 answer 57 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

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1 answer 71 views

What is the product formed when 1-bromobutane is reacted with aqueous sodium hydroxide? Draw the mechanism that explains the reaction pathway of this nucleophilic substitution reaction.

asked Jan 21 in Organic Chemistry

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1 answer 35 views

What does the cognitive theory explain?

asked Jan 15 in Psychology

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1 answer 29 views

What are are organisms that feed on small pieces of organic matter?

asked Jan 2 in Science

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