Chromium is a transition metal, and oxygen has an oxidation number of -2. use this information to match each compound to its chemical formula. Cro —>

Cro2 —>

Cro3 —>

Cr2O3 —>

Chromium(Vl) oxide

Chromium(lV) oxide

Chromium(lll) oxide

Chromium(ll) oxide

the correct answer to this question is 2

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.