Question

Calculate the formula unit mass of NaCl and CaCl2

Answer 1

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Here's your answer

Molar mass of Na=23g/mol

" " " Cl=35.5g/mol

Formula unit mass of NaCl=23 + 35.5 = 58.5 gm per mole

Molar mass of Ca=40g/mol

Molar mass of Cl2= 35.5g/mol*2=70gm per mole

F. U. M. = 40+70=110

gm per mole

Hope it helps you

Answer 2

Given: The given compounds are NaCl and calcium chloride.

To find: We have to find the formula unit mass.

Solution:

The formula of sodium chloride is NaCl.

The atomic mass of the Na atom is 23u.

The atomic mass of Cl is 35.5u.

So, its formula unit mass will be-

23+35.5=58.5u.

Thus, the formula unit mass of NaCl is 58.5.

The formula of calcium chloride is $CaCl_2$.

The atomic mass of the Ca atom is 40u.

The atomic mass of Cl is 35.5u.

So, its formula unit mass will be-

40+35.5×2=111u.

Thus, the formula unit mass of [tex]CaCl_2[/tex is 111.