An unknown compound shows instant formation of a blue-green color when subjected to the conditions of a Chromic Acid test, but shows no precipitate formation when subjected to a 2,4-Dinitrophenylhydrazine (DNP) test. Based on these results, what type of compound is the unknown compound

it would be d. henry moseley

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.