Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Some Basic Concepts of Chemistry

Question:

Calculate the mass of an atom of silver.

Options:

\(1.793 × 10^{–22}g\)

\(1.93 × 10^{–22}g\)

\(1.0 × 10^{–22}g\)

\(2.793 × 10^{–22}g\)

Correct Answer:

\(1.793 × 10^{–22}g\)

Explanation:

The correct answer is option 1. \(1.793 × 10^{–22}g\).

\(\text{1 mole of Ag atoms = 108g} \text{ = }6.022\text{ × }10^{23}\)

\(6.022\text{ × }10^{23}\text{ atoms of silver have mass = 108g}\)

∴ \(\text{Mass of one atom of silver (Ag) =}\frac{108}{6.022\text{ × }10^{23}}\text{ = }1.793 × 10^{–22}g\)