A candle burns for 5 minutes under a can of water containing 150 grams of water at 20C. After 5 minutes, the final temperature of the water is 90 C? How many Joules of energy did the water gain?

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when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.