Question

One amu is equal to,

• A. 6.022 × 10⁻²³ g
• B. 8.302 × 10⁻²³ g
• C. 1.6605 × 10⁻²⁴ g
• D. 4.661 × 10⁻²⁵ g

Hint:

Remember that 1 amu is equal to \( 1.6605 \times 10^{-24} \) g, a standard conversion used in atomic mass calculations.

Answer 1

The Correct Option is C

Step 1: Understanding atomic mass unit (amu).
One atomic mass unit (amu) is defined as one twelfth of the mass of a carbon-12 atom. This is approximately \( 1.6605 \times 10^{-24} \) grams.
Step 2: Analyzing the options.
(A) 6.022 × 10⁻²³ g: Incorrect. This value is close to Avogadro's number, not the mass of one amu.
(B) 8.302 × 10⁻²³ g: Incorrect. This is not the correct value for one amu.
(C) 1.6605 × 10⁻²⁴ g: Correct — This is the precise mass of one atomic mass unit (amu).
(D) 4.661 × 10⁻²⁵ g: Incorrect. This is not the correct value for one amu.
Step 3: Conclusion.
The correct answer is (C) 1.6605 × 10⁻²⁴ g, which is the mass of one amu.