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|The preparation of cupric oxide is done by heating copper in the presence of oxygen or by dissolving copper in nitric acid and igniting the cupric nitrate formed. But in each case, the ratio of copper to oxygen by mass is always constant. It proves ?|
Sodium amalgam is a/an
20 mL of 20 % NaOH (w/V) is mixed with 20 mL of 20 % HCl (w/V). The resulting solution is
Hydrogen and oxygen combine in a definite ratio of 1:8 to form water. The mass of oxygen gas which combines with 5.175 g of hydrogen to form water will be,