If I have 2.3 mol of platinum (195 g/mol) how many atoms do I have? Caffeine is

Question

If I have 2.3 mol of platinum (195 g/mol) how many atoms do I have?
Caffeine is a molecule with a molecular weight of 194 g/mol. One shot of expresso is 64 mg of caffeine, how many caffeine molecules are there? If I have 2.3 mol of platinum (195 g/mol) how many atoms do I have?
Caffeine is a molecule with a molecular weight of 194 g/mol. One shot of expresso is 64 mg of caffeine, how many caffeine molecules are there? If I have 2.3 mol of platinum (195 g/mol) how many atoms do I have?
Caffeine is a molecule with a molecular weight of 194 g/mol. One shot of expresso is 64 mg of caffeine, how many caffeine molecules are there?

Explanation / Answer

(1) 1 mol platinum = 6.022 X 1023 platinum atoms

2.3 mol platinum = 2.3 X 6.022 X 1023 platinum atoms

= 1.38506 X 1024 platinum atoms are present.

(2) 194 g. of caffeine = 6.022 X 1023 caffeine molecules

Then, 64 mg = 0.064 g. of caffeine = ( 0.064 X 6.022 X 1023 ) / 194

= 1.9866 X 1020 caffeine molecules

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.