A 19.0-g sample of lithium is completely burned in air to form lithium oxide. The mass of lithium oxide must be

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Answer another question about the story of the prom.

  QUESTION 5     This question is about energy resources.         (a) The table (see addendum) lists some methods of generating electricity using energy resources. From the table, choose which methods uses a renewable energy source. One has been indicated. List the others. (3)       (b) Solar cells can be used to generate electricity.   (i) How is energy transferred from the Sun to a solar cell? A    by heating B    by radiation C    electrically D    mechanically  (1)  (ii) State one disadvantage of using solar cells to generate electricity. (1)

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