How many atoms of He gas are present in a 450 mL container at 35°C and 740 mmHg? A)0.017 He atoms B)0.068 He atoms C)1.2 x 10⁵ He atoms D)1.0 x 10²² He atoms E)7.9 x 10²⁴ He atoms

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Quizplus · Accepted Answer

To find the number of atoms, use the ideal gas law PV = nRT to find moles (n), then multiply by Avogadro's number (6.022 x 10^23 atoms/mol). Convert 740 mmHg to atm, 450 mL to liters, and use R = 0.0821 L·atm/mol·K. The calculation gives approximately 1.0 x 10^22 atoms.

How Many Atoms of He Gas Are Present in a 450