Chemistry, 21.11.2020 22:10 hviland4371
Can someone help me with this I’m trying to review for my test but still don’t understand how to to this, thank you!
In this lab, you will be determining the mass percent of copper in a sample of brass. You will first be adding nitric acid to the brass, which will react with the copper and the zinc in the brass sample (thus dissolving it). This results in a colorless solution of zinc nitrate and a deep blue solution of copper(II) nitrate. The equation for the formation of copper(II) nitrate is shown below.
Balanced molecular equation: 4 HNO3(l) + Cu(s) → Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(l)
Balanced net ionic equation: 4 H+(aq) + 2 NO3–(aq) + Cu(s) → 2 NO(g) + 2 H2O(l) + Cu2+(aq)
Assuming you start with a 2g sample of brass and assuming your brass sample is 100% copper, calculate the minimum volume (in mL) of concentrated 15.8M HNO3(aq) that needs to be added to react completely with the brass (assumed to be 100% copper for now). Note: the moles of H+(aq) represent the moles of HNO3(aq) reacted in the balanced equation above.
Answers: 3
Chemistry, 22.06.2019 01:50, lildestinyquintana
Ase your answer to this question on the information below. hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant. the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen. chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product. nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.
Answers: 1
Chemistry, 22.06.2019 11:30, ayoismeisjjjjuan
Which statement best describes the flow of energy in this scenario
Answers: 1
Chemistry, 22.06.2019 12:10, coastieltp58aeg
Building glycogen from glucose molecules is an example of
Answers: 3
Can someone help me with this I’m trying to review for my test but still don’t understand how to to...
Health, 24.09.2019 06:00