Assign an oxidation number to each element in the reaction.

CaF2(s) + H2SO4(aq) → CaSO4(aq) + 2HF(g)

In CaF2, the oxidation number of Ca is
, and that of F is
. In H2SO4, the oxidation number of H is
, that of S is
, and that of O is
. In CaSO4, the oxidation number of Ca is
, that of S is
, and that of O is
. In HF, the oxidation number of H is
, and that of F is
.

Select the correct answer from each drop-down menu. daniel and sanya are scientists. daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. sanya is investigating whether the discharge from industrial plants has any impact on the ph concentration of freshwater swamps in the surrounding area. which fields of science are daniel’s and sanya’s studies most closely related to? daniel’s field of study is related to science, and sanya’s field of study is related to .

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

What is the independent variable in this investigation? mass volume sample number substance density