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−.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?