A single atom of hydrogen has a mass of 1.0 amu, while a mole of hydrogen atoms has a mass of 1.0 g. Select the correct conversion factor between atomic mass units and grams. A)1 amu = 1 g exactly B)1 amu = 6.0 × 10 ²³ g C)1 g = 6.0 × 10 ²³ amu D)1 g = 1.7 × 10 ⁻²⁴ amu E)None of these choices are correct.

Question

Quizplus · Accepted Answer

The conversion factor between atomic mass units (amu) and grams (g) is 1 g = 6.022 x 10^23 amu, which is known as Avogadro's number. Therefore, one mole of hydrogen (which has a mass of 1 g) contains 6.022 x 10^23 hydrogen atoms (each with a mass of 1 amu). So 1 amu is equivalent to 1/6.022 x 10^23 g, or approximately 1.66 x 10^-24 g. Therefore, the correct conversion factor is 1 g = 6.022 x 10^23 amu.

A Single Atom of Hydrogen Has a Mass of 1