Question

unit exam - covalent compounds
1 h 1.01
16 s 32.07
what is the molar mass of the covalent compound h2s?
h2s = ? $\frac{g}{mol}$

Explanation:

Step1: Determine hydrogen's contribution

The molar - mass of H is 1.01 g/mol and there are 2 H atoms in H₂S. So the total mass from H is $2\times1.01$ g/mol.
$2\times1.01 = 2.02$ g/mol

Step2: Determine sulfur's contribution

The molar - mass of S is 32.07 g/mol and there is 1 S atom in H₂S. So the mass from S is 32.07 g/mol.

Step3: Calculate the molar mass of H₂S

Add the mass contributions from H and S.
$2.02+32.07=34.09$ g/mol

Answer:

34.09 g/mol