Question

what solutions plz help me immediately​

Answer 1

Answer:

hope this will help you.

Answer 2

Answer:

Explanation:

Firstly find no of moles of CaCl2=Mass of CaCl2 /Molar mass

Molar mass=40+2*35.5=111 g/mol

Putting values:

  n=111/111         Mass of CaCl2 is given-111 g

 n=1 mol

Now find no of calcium and chloride ion.

CaCl2→ Ca2+   +      2Cl-

No of calcium ions= n * avogadro number (Na) * no of ion (ca2+)

                            = 1 * Na * 1

                            1NA

No of chloride ion= n * NA * No of ion (Cl-)

                             =1 * NA  * 2Cl-                 2 chloride ions are present

                            2 NA.

So there are 1 NA Ca2+ ion and 2NA Cl- ions.

HOPE IT WILL HELP YOU!