How can you find atoms and molecules?

2 Answers
Apr 3, 2018

Answer:

Well you can find atoms and molecules, using the Avogadro's constant;

Explanation:

Using this formula;

#"No of moles" = "Atoms"/"Avogadro's constant"#

Where, Avogadro's constant is #6.023 xx 10^-23#

Apr 4, 2018

Answer:

Refer to the explanation.

Explanation:

If you know moles of atoms or molecules, you can determine the number of atoms or molecules using Avogadro's number:

Example 1

How many atoms are in #"5.0 mol Cu"#?

#5.0color(red)cancel(color(black)("mol Cu"))xx(6.022xx10^23"atoms Cu")/(1color(red)cancel(color(black)("mol Cu")))=3.0xx10^24" atoms Cu"#

Example 2

How many molecules are in #"3.5 mol C"_6"H"_12"O"_6#?

#3.5color(red)cancel(color(black)("mol C"_6"H"_12"O"_6))xx(6.022xx10^23"molecules C"_6"H"_12"O"_6)/(1color(red)cancel(color(black)("mol C"_6"H"_12"O"_6)))=2.1xx10^24" molecules C"_6"H"_12"O"_6"#