UP Board Class 12 th Chemistry paper 1 is scheduled to be held on February 20, 2018, and Paper 2 will be held on February 22, 2018. Students find chemistry a difficult subject because of the chemical ...
Incorrect Chemical Formulas: Sometimes an equation is unbalanced because the chemical formulas of the reactants or products are incorrect. For example, writing H2O2 (hydrogen peroxide) instead of H2O ...
Oxygen usually has an oxidation state of -2 in compounds. There are exceptions, such as in peroxides (e.g., H2O2), where it is -1, and in compounds with fluorine (e.g., OF2), where it is positive.
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