Which temperature do they need to perform the experiment for perovskite to conduct electric current? A: T=1980°C
B: T>1980°
C: T>_ 1980°C
D:T< 1980°C

For C it's suppose to be an less than equal sign .

Which other elements contain the same number of outer electrons as sodium

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

Word equation for k(s) +h2o(l) yield koh (aq) + h2