Question

Question #2b990

Answer 1

`4.07xx10^2" mol of S"`

Explanation:

The factor label method of converting units begins with writing the given quantity as the numerator of a fraction whose denominator is 1.

Given:

`(2.45 xx 10^26" atoms of S")/1`

Multiply by the reciprocal of the Avogadro Constant so that units of atoms of Sulfur are cancelled:

`(2.45 xx 10^26" atoms of S")/1(1" mol of S")/(6.02xx10^23" atoms of S")`

Please observe the cancellation:

`(2.45 xx 10^26cancel" atoms of S")/1(1" mol of S")/(6.02xx10^23cancel" atoms of S")`

This leave us with only the units of moles of Sulfur:

`(2.45xx10^26)/(6.02xx10^23)" mol of S"`

`4.07xx10^2" mol of S"`