PLZ HELP ASAP IM TIMED! Which of the following statements is true?

a.) Sound vibrations are changed into electrical impulses by the eardrum.
b.) It is dangerous to listen to sounds over 160 dBs.
c.) High-pitched sounds have low frequencies.
d.) All of the above.

THERE IS A QUESTION LIKE THIS ON BUT ITS VOTED 1.5 STARS PLZ HELP ASAP PLZ ILL GIVE 25 POINTS PLZ

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

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.