Practice Avogadro's Number in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The defined number of particles in exactly one mole of any substance: .
A mind-bogglingly large number — but it's exactly the right size to make atomic counting practical.
Showing a random 20 of 50 problems.
Example 1
hardA sample of has molecules. What mass does it have? ()
Example 2
easyHow many atoms are in 1 mol of helium?
Example 3
easyHow many particles are in 4 mol of any substance?
Example 4
mediumHow many formula units are in 1.5 mol of ?
Example 5
mediumHow many oxygen atoms are in 0.5 mol of ?
Example 6
easyHow many ions are in 0.1 mol of ?
Example 7
easyHow many molecules are in 5 moles of ?
Example 8
mediumHow many chloride ions are in 0.25 mol ?
Example 9
mediumHow many moles contain particles?
Example 10
easyConvert atoms to moles.
Example 11
easyHow many molecules are in mol of ?
Example 12
mediumA sample contains molecules. How many moles is that?
Example 13
hardA sample contains atoms of carbon. How many grams is that? ()
Example 14
challengeIf 1 mole of pennies were stacked, the column would be roughly km tall. Estimate how many years light (300,000 km/s) would take to travel that distance. (1 year s)
Example 15
easyHow many particles are in 0.25 mol of argon?
Example 16
easyHow many molecules are in 0.5 mol of ?
Example 17
mediumA sample has molecules. How many moles is that?
Example 18
mediumHow many atoms are in 0.5 mol of (count all atoms)?
Example 19
easyWhat is the numerical value of Avogadro's number?
Example 20
mediumHow many atoms are in 0.5 mol of ?