Questions by JoannaLangne

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1 answer 60 views

Determine the standard enthalpy change for the formation of methane gas (CH4) from its constituent elements (C and H2) given the following standard enthalpy of formation values: ΔHf°(C) = 0 kJ/mol and ΔHf°(H2) = 0 kJ/mol.

asked Feb 4 in Chemical thermodynamics

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1 answer 10 views

Calculate the reaction quotient, Qc, for the following reaction:2NO2(g) + 7H2(g) → 2NH3(g) + 4H2O(g)at a temperature of 300 K and a pressure of 0.5 atm for each gas species. The equilibrium constants, Kc, at the same temperature and pressure are:Kc = 0.0080 for the reverse reactionKc = 7.2 × 10^-7 for the forward reaction

asked Feb 3 in Chemical thermodynamics

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1 answer 33 views

What are used as model organisms in molecular biology and genetics?

asked Jan 6 in Science

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1 answer 83 views

What two forces tend to keep an animal stationary and thus oppose locomotion?

asked Dec 27, 2024 in Science

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