A student spent 10 minutes cleaning her car with a 500 W vacuum cleaner. How much energy, in joules, did the vacuum cleaner use?
O A. 5000
B. 300,000 J
C. 1,800,000 J
O D. 30,000 J
SUBMIT

i believe it is c.) 1575 j.

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.

the correct answer is:

a. formation of precipitation