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kenny6666 [7]
3 years ago
9

The pH of an aqueous solution:_________

Chemistry
1 answer:
dybincka [34]3 years ago
7 0

Answer:

d) must remain at 7

Explanation:

The pH of the aqueous solution should be kept at 7 as it is considered to be a neutral pH chemical.

If the pH exceeds the value 7, it is considered alkaline, and without the pH decreases from the value 7, it is considered acidic.

That is why if this value varies, the qualities of the neutral pH will not be maintained.

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Write a symbolic notation of an isotope of an element having 8 protons 8 electrons and 10 neutrons
Bezzdna [24]

Answer:

                       ¹⁸₈O

Explanation:

                     The symbolic notation of an isotope of an element is generally written as;

                                                  ᵃₙX

Where;

                 a  =  Mass Number

                 n  =  Atomic Number

                 X  =  Element Symbol;

Mass number is the sum of neutrons and protons present in the nucleus. It is given as,

Mass Number  =  No. of Protons  +  No. of Neutrons

As Given

                 Mass  Number  =  8 + 10

                 Mass  Number  =  a  =  18

Also,

Atomic Number is defined as the number of protons contained in the nucleus of an atom. Hence, in this case;

                 Number of Protons = Atomic Number = n = 8

Also, the element with atomic number 8 in periodic table is Oxygen. Hence;

                 X  =  O

Therefore, The symbolic notation for given element is ¹⁸₈O.

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3 years ago
What is the mass of a magnesium block that measures 2.5cm x 3.5cm x 1.5cm
puteri [66]
The mass of a magnesium block that measures 2.5cm x 3.5cm x 1.5cm, the correct answer would be option “B.”
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