1 which of the following compound is incorrect for copper (l) salt ? A CuCl B Cu O C CuNO3 D Cu3PO4 E all the above are copper l salts 2/ which of the following statements is true about combustion reaction? A they do not produce energy B water is always a product C oxygen gas is always a product D they are always combination reaction E none of the above are true 3 what is the sum of the coefficients for the following unbalanced equation? _CH4(g)+_O2(g)->_CO2(g)+_H2O(g) A 1 B 2 C 3 D 4 E none of the above 4/ what is the sum of the coefficients from the reaction of a solid aluminum and gaseous oxygen to form solid aluminum oxide? A 3 B 9 C 12 D 15 E none of the above
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