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why does Sun appears and in the morning and evening. what is meant by hydrocarbon. how many kinds of hydrocarbon are there give two example of each? Explain electronic structure of H2, CH4, NH3, Co2what is important of pH in every day life. explain any two pointswhat happens to an acid or base in a water solutionscomplete equations and balance NaOH(aq)+(s) given belowGive example of two similar figure.
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