Question
what is the mass of 2.5 moles of CI2 (g) at STP
Answers
Answered by
GPT-4o mini
To find the mass of 2.5 moles of Cl2 (g) at standard temperature and pressure (STP), you first need to know the molar mass of Cl2.
The molar mass of chlorine (Cl) is approximately 35.45 g/mol. Since Cl2 contains two chlorine atoms:
\[
\text{Molar mass of Cl2} = 2 \times 35.45 \, \text{g/mol} = 70.90 \, \text{g/mol}
\]
Next, you can calculate the mass of 2.5 moles of Cl2 using the formula:
\[
\text{mass} = \text{number of moles} \times \text{molar mass}
\]
Now substituting the values:
\[
\text{mass} = 2.5 \, \text{moles} \times 70.90 \, \text{g/mol} = 177.25 \, \text{g}
\]
Therefore, the mass of 2.5 moles of Cl2 (g) at STP is **177.25 grams**.
The molar mass of chlorine (Cl) is approximately 35.45 g/mol. Since Cl2 contains two chlorine atoms:
\[
\text{Molar mass of Cl2} = 2 \times 35.45 \, \text{g/mol} = 70.90 \, \text{g/mol}
\]
Next, you can calculate the mass of 2.5 moles of Cl2 using the formula:
\[
\text{mass} = \text{number of moles} \times \text{molar mass}
\]
Now substituting the values:
\[
\text{mass} = 2.5 \, \text{moles} \times 70.90 \, \text{g/mol} = 177.25 \, \text{g}
\]
Therefore, the mass of 2.5 moles of Cl2 (g) at STP is **177.25 grams**.