What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

0.176
5.18
8.82
9.20

Answer : The correct option is, 5.18

Explanation : Given,

Concentration of ion =

pH : It is defined as the negative logarithm of hydrogen ion concentration.

First we have to calculate the pOH.

Now we have to calculate the pH.

Therefore, the pH of the solution is, 5.18

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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