Question

Suppose you pull off the broken tungsten filament in a burned-out incandescent

light bulb. You take its mass and find it to be 0.100 grams. How many atoms of
tungsten are in this filament?
5.44 x 10-
1.84 x 1025
3.28 x 1020
6.022 x 1023

Answer 1

Molar mass of tungsten =183u

No of moles

• 0.1/183
• 0.0055mol

No of atoms

• Moles×Avagadro no
• 0.0055(6.022)10²³
• 0.0033×10²³
• 3.3×10²⁰

Option C