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4 years ago

The [H3O+] of a solution is 2.5 x10-7. What is the pOH of the solution?

Chemistry

1 answer:

xz_007 [3.2K]4 years ago

6 0

Answer:

7.4.

Explanation:

∵ pH = -log[H₃O⁺].

∴ pH = -log(2.5 x 10⁻⁷) = 6.6.

<em>∵ pH + pOH = 14.</em>

<em />

∴ pOH = 14.0 - pH = 14.0 - 6.6 = 7.4.

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2 years ago

14. A 500.0 ml flask contained O2 gas at 25.0°C at a pressure of 4.5 atm. What is the number

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3 years ago

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<h3>Number of atoms in a compound</h3>

Since we are not looking at the number of moles, the mass of the compounds has no bearing on the number of atoms of oxygen.

The chemical formula for carbon dioxide is $CO_2$ . Thus, it has 2 atoms of oxygen.
The chemical formula for potassium chlorate is $KClO_3$ . Thus, it has 3 oxygen atoms.
The chemical formula for calcium perchlorate is $Ca(ClO_4)_2$ . Thus, it has 8 atoms of oxygen.
The chemical formula for sodium hydroxide is NaOH. Thus, it has 1 atom of oxygen.

Therefore, the compound with the largest number of oxygen atoms is calcium perchlorate.

More on the number of atoms in compounds can be found here: brainly.com/question/1686912

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