Chemistry

posted by norma

Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e-, how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of electricity per month, which corresponds to approximately of 2.65 * 104 mol electrons at the voltage of a fuel cell.

  1. DrBob222

    2e/mol H2 = 2e/2g = 1e/1g
    2.65E4 moles e x (6.022E23 e/mole e) x (1 e/1g) = ??grams, then convert to kg. Check my thinking.

  2. norma

    thank Dr.Bob222 I see you got the same answer I did. I got one more I need help with if you can help me please
    Classify each of the following solutions as acidic, basic, or neutral based on the pH value.
    (a) pH = 8.0
    (b) pH = 7.0
    (c) pH = 3.5
    (d) pH = 6.1

  3. DrBob222

    pH = 7 is neutral
    pH<7 = acidic
    pH>7 = basic

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