Which statement is true about a nickel-cadmium dry cell?(Use the activity series of metals below to help you predict the correct statement.) Most Active Li
K
Ba
Sr
Ca
Na
Mg
Al
Mn
Zn
Fe
Cd
Co
Ni
Sn
Pb
H
Cu
Ag
Hg
Least Active Au

The anode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

The cathode reaction is Cd+2OH−→Cd(OH)2+2e−.

The cathode reaction is Cd+NiO2+2H2O→Cd(OH)2+Ni(OH)2.

The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

What forms when chemical reactions combine pollution with sunlight?

The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.