For each chemical reaction listed in the table below, decide whether the highlighted atom is being oxidized or reduced or neither oxidezed nor reduced. a. 4hf(g) + sio2(s) -> sif4(g) + 2h20(g) higlithed: si b. c(s) + 02(g) -> co2(g) higlithed: c c. na2co3(s) + h3po4(aq) -> na2hpo4(aq) + co2(g) +h2o(l) higlithed: c d. cuso4(aq) + zn(s) -> znso4(aq) + cu(s) higlithed: cu

a. The oxidation state of Si in SiO₂ is +4 and the oxidation state of Si in SiF₄ is +4. So, it is neither reduced nor oxidized.

b. The oxidation state of C in C (s) is 0 and the oxidation state of C in CO₂ is +4. As the oxidation state increases, it is being oxidized.

c. The oxidation state of C in Na₂CO₃ is +4 and the oxidation state of C in CO₂ is +4. So, it is neither oxidized nor reduced.

d. The oxidation state of Cu in CuSO₄ is +2 and it is 0 in Cu (s). So, it is reduced.

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.