Chemistry in Action: Exploring Phosphoric Acid

a) What is the percent composition of Oxygen(O) in phosphoric acid? b) Determine the number of H atoms in 5.22 mol phosphoric acid? c) Calculate the total number of electrons in 75 phosphoric acid molecules. a) The percent composition of oxygen in phosphoric acid is approximately 16.33%. b) There are 9.52 × 10^24 hydrogen atoms in 5.22 mol of phosphoric acid. c) There are 1050 electrons in 75 molecules of phosphoric acid.

a) Percent Composition of Oxygen in Phosphoric Acid

Oxygen (O) in phosphoric acid (H3PO4) contributes to approximately 16.33% of its composition. This calculation is derived from the molar masses of oxygen and phosphoric acid and involves dividing the molar mass of oxygen by the molar mass of phosphoric acid.

b) Number of Hydrogen Atoms in Phosphoric Acid

In 5.22 mol of phosphoric acid, there are approximately 9.52 × 10^24 hydrogen atoms. This calculation is based on Avogadro's number and the molar ratio of hydrogen atoms in each molecule of phosphoric acid.

c) Total Number of Electrons in Phosphoric Acid Molecules

With 75 molecules of phosphoric acid, the total number of electrons is 1050. Each molecule contains a specific number of electrons corresponding to the atoms present in the molecule, which sums up to 1050 electrons in this case.

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