Chemistry, 05.11.2019 04:31, babyface1686
The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can get to the zinc). the reaction between the acid and the zinc is as follows: 2h+(aq)+zn(s)→h2(g)+zn2+(aq). when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 ∘c was 0.953 l at a total pressure of 752 mmhg .
Answers: 2
Chemistry, 22.06.2019 07:20, camillexv2668
2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here
Answers: 1
Chemistry, 22.06.2019 11:00, RidhaH
Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.
Answers: 1
Chemistry, 22.06.2019 17:40, aguilarjose
If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?
Answers: 1
The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is fi...
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