Asked by bella

How many mol of PCl5 are in 0.17 g of PCl5?

2.56 × 10–3 mol of PCl5
3.81 × 100 mol of PCl5
3.54 × 101 mol of PCl5
8.16 × 10–4 mol of PCl5

the second one?

Answers

Answered by DrBob222
moles = grams/molar mass
Answered by DrBob222
No, not #2. You're guessing.
Answered by DrBob222
You're still guessing. What is the molar mass of PCl5?
mols = grams/molar mass PCl5 = 0.17/molar mass PCl5 = ?
Use your calculator. Stop guessing. I suppose you realize that you have guessed twice and you have only two choices left. The next guess will tell you the correct answer. Let me see your work along with you answer.
Answered by Sebastian
3.54 x 10¹ mol of PCl5
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