Question

Which sample contains the largest number of oxygen atoms? Select one: a. 8.0 g of carbon dioxide b. 8.0 g of potassium chlorate c. 8.0 g of calcium perchlorate d. 8.0 g of sodium hydroxide

Answer 1

The sample with the largest number of oxygen atoms will be calcium perchlorate.

Number of atoms in a compound

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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