Which is the balanced half-reaction equation for the reduction of Al3+ to Al?
1. A13+ + 3e - Al
2. A13+ - Al + 3e
3. Al + 3e - A13+
4. Al - A13+ + 3e

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.