One nanogram does not seem like a very large number. How many magnesium atoms are there in 1.00 ng of magnesium? A)4.11 * 10^-11 atoms B)2.48 * 10¹³ atoms C)6.83 * 10^-35 atoms D)6.02 * 10¹⁴ atoms E)1.46 * 10³⁴ atoms

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Quizplus · Accepted Answer

To find the number of atoms, divide the mass (1.00 ng = 1.00 x 10^-9 g) by the molar mass of magnesium (24.305 g/mol), then multiply by Avogadro's number (6.022 x 10^23 atoms/mol). This gives approximately 2.48 x 10^13 atoms.

One Nanogram Does Not Seem Like a Very Large Number