What is the molar mass of Ag2S?
Understand the Problem
The question is asking for the molar mass of silver sulfide (Ag2S). To find this, we will sum the atomic masses of silver (Ag) and sulfur (S), considering there are two silver atoms in the compound.
Answer
The molar mass of silver sulfide (Ag2S) is $247.81 \, \text{g/mol}$.
Answer for screen readers
The molar mass of silver sulfide (Ag2S) is $247.81 , \text{g/mol}$.
Steps to Solve
- Identify Atomic Masses
First, we will identify the atomic masses of silver (Ag) and sulfur (S) from the periodic table.
- Atomic mass of Ag = 107.87 g/mol
- Atomic mass of S = 32.07 g/mol
- Calculate the Mass of Silver in Ag2S
Since there are 2 silver atoms in silver sulfide (Ag2S), we will multiply the atomic mass of silver by 2.
$$ \text{Mass of Ag} = 2 \times \text{Atomic mass of Ag} = 2 \times 107.87 , \text{g/mol} = 215.74 , \text{g/mol} $$
- Add the Mass of Sulfur
Next, we will add the atomic mass of sulfur to the total mass of silver from the previous step.
$$ \text{Molar mass of Ag2S} = \text{Mass of Ag} + \text{Atomic mass of S} $$
Substituting in the values:
$$ \text{Molar mass of Ag2S} = 215.74 , \text{g/mol} + 32.07 , \text{g/mol} $$
- Calculate the Total Molar Mass
Now, we will perform the final calculation to find the molar mass of silver sulfide.
$$ \text{Molar mass of Ag2S} = 215.74 , \text{g/mol} + 32.07 , \text{g/mol} = 247.81 , \text{g/mol} $$
The molar mass of silver sulfide (Ag2S) is $247.81 , \text{g/mol}$.
More Information
The molar mass is an important value in chemistry as it helps in converting between grams and moles of a compound. Silver sulfide is often encountered in various chemical applications and industries.
Tips
- Forgetting to multiply the atomic mass of silver by 2 when calculating the mass contribution from silver atoms.
- Confusing the unit conversions or misreading atomic masses from the periodic table.
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