Ask Question
2 November, 04:57

4. How many moles are in 54.0 grams of Silver?

54.0 g Ag x (108mol ag / 1 g ag) = 5,832 ag moles Ag

(Use the gray boxes to insert the values for the conversion factors.)

5. What is the mass of 6.3 moles of Sulfur?

6.3 mol S x (/) = g S

6. How many atoms are in 6.0 moles of Argon?

6.0 mol Ar x (/) = atoms of Ar

7. How many moles of Kr are in 112 g of Krypton?

112 g Kr x (/) = moles of Kr

8. How many moles are in 1.93 x1024 formula units of KF, potassium fluoride?

1.93 x1024 formula units x (/) = mol KF

(The next two problems need 2 step conversions - so there are two conversion factors (fractions) for the problem - remember the mole map - covert to moles first, then to the desired unit.)

9. How many atoms are in 86.2 g of Si (silicon) ?

86.2 g Si x (/) x (/) = atoms of silicon

10. What is the mass in grams of 4.8 x 1024 atoms of Magnesium?

4.8 x 1024 atoms of Mg x (/) x (/) = g Mg

+2
Answers (1)
  1. 2 November, 07:31
    0
    4. Molar mass of silver m Ms~=108 g/mol

    Hence there are n=54 * (1/108) = 0.5 mols of Silver in 54 grams of Silver.

    5. 6.3 * (108/1) = 680.4g

    6. Avogadro's number : Na~=6.022*10^23.

    6.0 * (6.022*10^23/1) = 36.132*10^23 atoms

    7. Molar mass of Krypton : Mk=84 g/mol

    112/84=1.33 moles of Kr

    8. 1.93*10^24 * (1 / (6.022*10^23)) = 3.2 moles KF

    9. Molar mass of Silicon : Ms=28 g/mol

    86.2 * (1/28) * (6.022*10^23/1) = 18.5*10^23 atoms of silicon

    10. Molar mass of Magnesium : M1=24 g/mol

    4.8*10^24 * (1 / (6.022*10^23)) * (24/1) = 191 g Mg
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “4. How many moles are in 54.0 grams of Silver? 54.0 g Ag x (108mol ag / 1 g ag) = 5,832 ag moles Ag (Use the gray boxes to insert the ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers