How many argon atoms are contained in 7.66 ×10⁵ mmol of argon? A) 4.61 × 10²⁶ Ar atoms B) 4.61 × 10²⁹ Ar atoms C) 3.83 × 10²⁶Ar atoms D) 7.86 × 10²¹ Ar atoms E) 3.24 × 10²⁶ Ar atoms

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Quizplus · Accepted Answer

To find the number of argon atoms in 7.66 × 10^15 mmol of argon, use Avogadro's number (6.022 × 10^23 atoms/mol). Since 1 mmol = 10^-3 mol, the calculation is 7.66 × 10^15 mmol × 10^-3 mol/mmol × 6.022 × 10^23 atoms/mol = 4.61 × 10^36 atoms.

How Many Argon Atoms Are Contained in 7