Question

question 5 of 10
which of the following represents the mass of 1 molecule of $\ce{sh_{2}}$?

\\(\bigcirc\\) a. 34.1 \\(m\\)

\\(\bigcirc\\) b. 34.1 mol/molecule

\\(\bigcirc\\) c. 34.1 amu

\\(\bigcirc\\) d. 34.1 mol/g

Explanation:

To determine the mass of 1 molecule of \( \text{SH}_2 \), we use the concept of atomic mass units (amu). The molar mass of a compound (in g/mol) is numerically equal to the molecular mass in amu. For \( \text{SH}_2 \):

• Atomic mass of S: ~32.1 amu
• Atomic mass of H: ~1.0 amu (2 H atoms: \( 2 \times 1.0 = 2.0 \) amu)
• Molecular mass: \( 32.1 + 2.0 = 34.1 \) amu.

Units like \( M \) (molarity), mol/molecule, or mol/g are incorrect for molecular mass. Only amu (atomic mass unit) is used to express the mass of a single molecule.

Answer:

C. 34.1 amu