Question

Jessica has 12.7 moles of a compound for an experiment. How many particles of the compound does she have?

A. 2.11 × 1023
B. 4.74 × 1023
C. 7.65 × 1023
D. 4.74 × 1024
E. 7.65 × 1024

Answer 1

E. 7.65 x 10(24)

Step-by-step explanation:

edmentum :)

Answer 2

Number of moles is defined as the ratio of given mass in g to the molar mass.

The mathematical expression is given as:

Number of moles =
`(given mass in g)/(molar mass)`

Number of moles of compound = 12.7 moles (given)

As, 1 mole of any compound is equal to
`6.022* 10^(23)` particles.

where,
`6.022* 10^(23)` is Avogadro number.

Formula for calculating particles is given by:

`N= n* N_(A)`

where, N = number of particles, n = number of moles and
`N_(A)` is Avogadro number.

Put the values,

`N= 12.7 moles* 6.022* 10^(23)`

=
`76.4794*10^(23)` or
`7.64794*10^(24)`

`\simeq 7.65*10^(24)`

Hence, number of particles of the compound is equal to
`7.65*10^(24)`