Questions by PreciousS02

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1 answer 34 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

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1 answer 19 views

What does social comparison theory propose?

asked Jan 15 in Psychology

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1 answer 6 views

What is the relevance of moral development in psychology?

asked Jan 14 in Psychology

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1 answer 14 views

Which gas is released by the group of archaea known as methanogens?

asked Jan 8 in Science

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1 answer 42 views

Where does a baby travel to after leaving the uterus?

asked Jan 8 in Science

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1 answer 5 views

What is the shape of the orbits that planets make around the sun?

asked Jan 7 in Science

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1 answer 24 views

What is the name of the mechanism in which sounds are encoded in microwaves by changing their frequency?

asked Jan 7 in Science

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1 answer 22 views

What is the name for the term that describes deep ocean water rising the surface?

asked Jan 7 in Science

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1 answer 16 views

What is it called when individual organisms work together with one another?

asked Jan 6 in Science

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1 answer 29 views

What common code do all known living organisms use?

asked Jan 6 in Science

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1 answer 27 views

What are the key cells of an immune response?

asked Jan 3 in Science

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1 answer 17 views

The type of eruption a volcano has depends on the type of what in its chamber?

asked Jan 2 in Science

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