Question

Which of the following contains the largest number of atoms?A) 1.0 mole C6H14B) 3.0 moles waterC) 12.0 moles silverD) 3.0 moles N2O5

Answer 1

The option that contains the largest number of atoms is C) 12.0 moles of silver, as it equates to 7.226 x 10^24 atoms, using Avogadro's number for calculation.

Step-by-step explanation:

The question of which of the following contains the largest number of atoms can be answered by considering the number of moles and understanding that one mole of any substance contains 6.022 x 1023 atoms or molecules (Avogadro's number). Therefore, to find the largest number of atoms among the options:

• A) 1.0 mole of C6H14 would contain 6.022 x 1023 molecules of hexane.
• B) 3.0 moles of water would contain 3 x 6.022 x 1023 molecules of water, or 1.807 x 1024 atoms.
• C) 12.0 moles of silver would contain 12 x 6.022 x 1023 atoms of silver, or 7.226 x 1024 atoms.
• D) 3.0 moles of N2O5 would have 3 x 6.022 x 1023 molecules of dinitrogen pentoxide.

Comparing these, the option with the largest number of atoms is C) 12.0 moles of silver.

Answer 2

C. 12.0 moles silver

Step-by-step explanation:

To determine the number of atoms in a given number of moles of a substance, we use Avogadro's number, which states that 1 mole of any substance contains approximately 6.022 × 10^23 particles (atoms, molecules, or ions).

Comparing the given options:

A. 1.0 mole C6H14: Each mole of C6H14 contains 6 moles of carbon atoms and 14 moles of hydrogen atoms, totaling 20 moles of atoms.

B. 3.0 moles water: Each mole of water (H2O) contains 3 moles of atoms (2 hydrogen atoms and 1 oxygen atom), so 3 moles of water contain 9 moles of atoms.

C. 12.0 moles silver: Each mole of silver (Ag) contains 1 mole of silver atoms, so 12 moles of silver contain 12 moles of atoms.

D. 3.0 moles N2O5: Each mole of N2O5 contains 7 moles of atoms (2 nitrogen atoms and 5 oxygen atoms), so 3 moles of N2O5 contain 21 moles of atoms.

Among the given options, 12.0 moles of silver (option C) contain the largest number of atoms since each mole of silver consists of 1 mole of silver atoms, which is greater than the number of atoms in the other options.

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