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Chemistry, 23.06.2019 09:30
Where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side
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Chemistry, 23.06.2019 13:30
The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)โh2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 ยฐc is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 ยฐc .) what mass of hydrogen gas is collected? answer in appropriate significant figures
Answers: 3
All chemical reactions either give off or absorb...
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