Question

What would Avogadro's number and the atomic mass of oxygen-16 be if the standard were that one mole of hydrogen is exactly one gram?

Answer 1

Avogadro's number, denoted by $N_A$, represents the number of atoms or molecules in one mole of a substance. The current accepted value for Avogadro's number is approximately $6.02214076\times 10^{23}$ particles per mole.

If the standard were that one mole of hydrogen is exactly one gram, we can calculate the values for Avogadro's number and the atomic mass of oxygen-16 using the following information:

1. The atomic mass of hydrogen is approximately 1.00784 atomic mass units (amu).
2. The atomic mass of oxygen-16 is approximately 15.999 amu.

To find Avogadro's number, we divide the mass of one mole of hydrogen by the atomic mass of hydrogen:

$$N_A=\frac{\text{mass of one mole of hydrogen}}{\text{atomic mass of hydrogen}}=\frac{1\text{g}}{1.00784\text{amu}}$$