Which of the following statements about the ph scale is true?

a. acids, which have lower concentrations of hydronium ions than bases, are found from 14 and down to 7.
b. acids, which have higher concentrations of hydronium ions than bases, are found from 0 and up to 7.
c. bases, which have higher concentrations of hydronium ions than acids, are found from 14 and down to 7.
d. bases, which have higher concentrations of hydronium ions than acids, are found from 0 and up to 7.

Option (C) is the correct answer.

Explanation:

Substances which are acidic in nature have pH less than 7 whereas substances which are basic in nature have pH more than 7.

On the other hand, substances which have pH equal to 7 are neutral in nature.

An acidic substance will have more number of hydrogen ions whereas a basic substance will have more number of hydronium ions.

Therefore, we can conclude that the statement bases, which have higher concentrations of hydronium ions than acids, are found from 14 and down to 7, is true.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

i think its 5049.

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