5. State the difference between the following:
(a) 2H and H.
(b) H,0 and 3H,O ?
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a. H2 is molecular hydrogen.it is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond. 2H denotes two moles of elemental hydrogen.it should be noted that elemental hydrogen is not bonded to anything
b. The heat of formation is defined as the heat generated or absorbed when the compound is formed form its component elements in their standard state.
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