Question

What is the mass in gram of 1 atom of an element if its atomic mass is 10 u?

• A. $2.06056\times10^{-22}\text{ g}$
• B. $1.66056\times10^{-23}\text{ g}$
• C. $1.06056\times10^{-24}\text{ g}$
• D. $3.66056\times10^{-25}\text{ g}$

Hint:

Logic Tip: $1 \text{ u}$ is precisely the reciprocal of Avogadro's number ($1 / N_A$) in grams. $1 / 6.022 \times 10^{23} \approx 1.66 \times 10^{-24} \text{ g}$. Multiplying this by 10 simply shifts the decimal point by one place, making the exponent $-23$.

Answer 1

The Correct Option is B