---
title: "A student preparing a target for an alpha-particle scattering experiment measures the mass of a thin square of pure gold foil (molar mass \\(197.0 \\text{ g/mol}\\)) to be \\(3.94 \\text{ mg}\\). Which of the following is closest to the number of gold atoms present in the foil?"
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url: "https://nerd-notes.com/ubq/119618/"
date_modified: "2026-08-21T08:11:48+00:00"
---

# A student preparing a target for an alpha-particle scattering experiment measures the mass of a thin square of pure gold foil (molar mass \(197.0 \text{ g/mol}\)) to be \(3.94 \text{ mg}\). Which of the following is closest to the number of gold atoms present in the foil?

A student preparing a target for an alpha-particle scattering experiment measures the mass of a thin square of pure gold foil (molar mass \(197.0 \text{ g/mol}\)) to be \(3.94 \text{ mg}\). Which of the following is closest to the number of gold atoms present in the foil?

- **A.** \(1.20 \times 10^{19} \text{ atoms}\)
- **B.** \(1.20 \times 10^{22} \text{ atoms}\)
- **C.** \(4.67 \times 10^{23} \text{ atoms}\)
- **D.** \(3.01 \times 10^{28} \text{ atoms}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119618/*