Cu(s) + 4 hno3 (aq) --> cu(no3)2 (aq) + 2no2 (g) + 2h2o(l)
each student in a class placed a
2.00 g sample of a mixture of cu and al in a beaker and placed the beaker in a fume hood. the students slowly poured 15.0 ml of 15.8 m hno3 (aq) into their beakers. the reaction between copper in the mixture and hno3 depicted above. the students observed that a brown gas was released from the beakers and that solutions turned blue, indicating the formation of cu2+. the solutions were then diluted with distilled water to known volumes. the students determined that the reaction produced .010 mole fo cu(no3)2. based on the measurement, what was the percent of cu by mass in the original 2.00 gram sample of the mixture? ( provide detailed explanation)
a)16%
b) 32%
c) 64%
d)96%

Motivation cannot be developed with practice; a person either possesses it or they do not.

Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback

What is the percent by mass of oxygen in fe2o3