Which of these is a problem with using nuclear energy?

A.
It is very expensive to use.

B.
It is a non-renewable energy source.

C.
There aren't enough qualified technicians.

D.
We don't have a way to contain the radioactive waste produced.

Idon’t understand this page, can someone ?

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

How many moles of oxygen react with 12 moles of aluminum