Question

please answer the question with explanation please​

Answer 1

0.2 molecules...

because....

CaCO

3

atomic mass = 40+12+3×16

=100

moles =

atomicmass

gramweight

=

100

20

(given)

=0.2 moles

Answer 2

Explanation:

no of moles = given mass / molar mass

molar mass of caco3 = 40+ 12 + 16x 3

= 40+ 12+ 48=100

no. of moles = 10/100

= 0.1 mole