1. Cupric sulfate was not as efficient as mercuric oxide , and yielded lower protein results. 2. Mercury batteries use a reaction between mercuric oxide and zinc electrodes in an alkaline electrolyte. 3. The metal itself was first produced by mercuric oxide . 4. He ultimately obtained oxygen by heating mercuric oxide , silver carbonate, magnesium nitrate, and other nitrate salts. 5. Originally, the catalyst of choice was mercuric oxide . 6. Magnesium was first produced by mercuric oxide . 7. A little extra mercuric oxide is put into the cell to prevent evolution of hydrogen gas at the end of life. 8. Strontium was eventually isolated in 1808 by Sir Humphry Davy by electrolysis of a mixture of strontium chloride and mercuric oxide . 9. In general, the reaction is exothermic, but, e . g ., the formation of mercuric oxide ( HgO ) is endothermic. 10. The M5 exposure meter required the PX625 1.35 V mercuric oxide coin type cell which was banned because of its mercury content.
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