Question

(i) Calculate the mass in grams of:
(a)2 molecules of HCI
(b)3 atoms of K​

Answer 1

Answer:

(a) 77g

(b) 57g

Explanation:

a. 2×HCl = 2× 1+35.5= 77g

b.3 × K = 3× 19 = 57g

Answer 2

Answer:

given molecule of HCL = 2 , mass =?, Gram molecular mass = 36.4 , avagdro number =6.022*10^23 , so no of moles = atom /6.022*10^23, by applying this formula we got number of in the place of atom there will also be molecule