Use the standard reduction potentials to find the equilibrium constant for each of the following reactions at 25°c.
(a) 5 fe2+(aq) + mno4? (aq) + 8 h+(aq) < > mn2+(aq) + 4 h2o(l) + 5 fe3+(aq)
(b) 2 ce4+(aq) + 2 cl ? (aq) < > cl2(g) + 2 ce3+(aq)
(c) br2(l) + 2 i ? (aq) < > 2 br? (aq) + i2(s)

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

The excretory system, need answers for all: )