How much hydrogen is needed to operate a 50 kw hydrogen/ oxygen fuel cell for 3 hours? the potential of the cell is 0.7v (remember that power = iv). the reaction at the anode is! h2 → 2h+ + 2e- 1.4 calculate the daily aluminum production of a 150,000 [a] aluminum cell that operates at a faradaic efficiency of 89%. the cell reaction is 2al2o3 + 3c → 4a1 + 3co2 1.5 the annual production of cl2 is about 45 million toys per year. assume that a typical plant is operational 90% of the year. the operating voltage of a cell is 3.4 v (considerably higher than the equilibrium voltage). (a) write down the half-cell reaction for the oxidation

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms