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

The number of particles  that  are in 12.7  moles of  compound that Jessica had is     7.65 x10^24 particles  of compound ( answer E)

    Calculation

The number  of particles are calculated  using the Avogadro's Principle  constant.

• that is according  to  Avogadro's    1 moles =  6.02 x10^23 particles

             what about 12.7 moles  of  compound=   ?  particles\

   by use of  cross multiplication

• number of particles  of compound=  [12.7  moles  x (6.02 x 10^23)]  /  1 mole  = 7.65 x 10^24  particles  of compound ( answer  E)

 N.b moles and moles cancels each  other

Answer 2

Answer:

76.5 x 10^24

Explanation:

This is correct :)