How many atoms of iron are present in 0.784 moles of iron?Group of answer choices0.784 atoms335 atoms1.30 x 10-24 atoms4.72 x 1023 atoms7.68 x 1023 atoms
Question
How many atoms of iron are present in 0.784 moles of iron?
Group of answer choices:
- 0.784 atoms
- 335 atoms
- 1.30 x 10^-24 atoms
- 4.72 x 10^23 atoms
- 7.68 x 10^23 atoms
Solution
To find the number of atoms in 0.784 moles of iron, you need to use Avogadro's number, which is 6.022 x 10^23 atoms/mole.
Step 1: Identify the given value and what you're solving for. In this case, you're given 0.784 moles of iron and you're solving for the number of atoms.
Step 2: Use Avogadro's number to set up the conversion. 1 mole of any substance contains 6.022 x 10^23 atoms.
Step 3: Multiply the given moles by Avogadro's number to find the number of atoms. 0.784 moles x 6.022 x 10^23 atoms/mole = 4.72 x 10^23 atoms
So, there are 4.72 x 10^23 atoms of iron in 0.784 moles of iron.
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