What are two reasons a common measuring system is important? Make sure you answer in complete sentences.

1 answer:

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For the answer to the question above, t<span>he use of a common measuring system makes it easier for people from different countries to communicate with each other. And also, the use of a common measuring system means a measurement in that unit has the same value anywhere in the world.

For more information,
</span>1) It allows for international cooperation. This means that for example, you can understand and work with other people's results, you can cooperate with other people in production of goods (if you produce one part of something and they produce another) and you can repeat their experiments to see if their results were sound

2) It reduces errors caused by not rigorous measurement: a common measurement supports more exact specification of the measuring units, since many people work towards specifying it exactly.

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Calculate either [ H 3 O + ] or [ OH − ] for each of the solutions.

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Answer: Solution A : $[H_3O^+]=0.300\times 10^{-7}M$

Solution B : $[OH^-]=0.107\times 10^{-5}M$

Solution C : $[OH^-]=0.177\times 10^{-10}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

$pH=-\log[H_3O^+]$