Question

Calculate the number of particles in: (i) 8g of O2 molecules (ii) 2.5 mol of
calcium atoms. tell me pleasssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss

Answer 1

Explanation:

number of particles = number of moles * Avagardo number

(i) 8g of O2

n = wt/atomic wt

  = 8/16 = 1/2 = 0.5 moles

No. of particles = 0.5 * Avagardo number = $3.011*10^{23}$

(ii) 2.5 moles of Ca

n = 2.5

No. of particles = 2.5* Avagardo number = $15*10^{23}$

 

Answer 2

Answer:

number of particles = number of moles * Avagardo number

(i) 8g of O2

n = wt/atomic wt

 = 8/16 = 1/2 = 0.5 moles

No. of particles = 0.5 * Avagardo number =  

(ii) 2.5 moles of Ca

n = 2.5

No. of particles = 2.5* Avagardo number =

Explanation: