please show work so I can learn how to do it. Thank you :)

5. What is the mass of 1 mol of atoms for an element?

9. The subscripts in a chemical formula give relationships between moles of the constituent elements and moles of the compound. Explain why these subscripts do not give Molecular formula = CH * 2 C2H2 relationships between grams of the constituent elements and grams of the compound.

13. How are the empirical formula and the molecular formula of a compound related?

17. How many mercury atoms are in 5.8 mol of mercury?

21. Complete the table. Element Moles Number of Atoms Ne 0.552 _____ Ar _____ 3.25 * 1024 Xe 1.78 _____ He _____ 1.08 * 1020

25. How many moles of tin atoms are in a pure tin cup with a mass of 38.1 g?

29. How many moles of atoms are in each elemental sample? (a) 1.34 g Zn (b) 24.9 g Ar (c) 72.5 g Ta (d) 0.0223 g Li

33. A pure silver ring contains 0.0134 mmol (millimol) Ag. How many silver atoms does it contain?

37. How many atoms are in each elemental sample? (a) 16.9 g Sr (b) 26.1 g Fe (c) 8.55 g Bi (d) 38.2 g P