3. Perform the following conversions. a. 1.51times 10^25 atoms of Si to mol of Si b. 4.25times 10^24 mol of H_(2)SO_(4) to molecules of H_(2)SO_(4) C. 8.95times 10^25 molecules of CCl_(4) to mol of CCl_(4)

Question

Answer 1

a. To convert atoms to moles, we need to use Avogadro's number, which is

atoms/mol.Given:

atoms of SiTo find the number of moles of Si, we divide the given number of atoms by Avogadro's number:Number of moles of Si =

Number of moles of Si = 251.5 molTherefore,

atoms of Si is equivalent to 251.5 mol of Si.b. To convert moles to molecules, we again use Avogadro's number.Given:

mol of

To find the number of molecules of

, we multiply the given number of moles by Avogadro's number:Number of molecules of

=

Number of molecules of

=

Therefore,

mol of

is equivalent to

molecules of

.c. To convert molecules to moles, Avogadro's number.Given:

molecules of

To find the number of moles of

, we divide the given number of molecules by Avogadro's number:Number of moles of

=

Number of moles of

= 148.5 molTherefore,

molecules of

is equivalent to 148.5 mol of

.

Problemas