<u>Answer:</u> The correct answer is Option A.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of nickel chloride = 24.6 g
Molar mass of nickel chloride = 129.6 g/mol
Putting values in above equation, we get:
Formula units is defined as lowest whole number ratio of ions in an ionic compound. It is calculate by multiplying the number of moles by Avogadro's number which is
We are given:
Number of moles of nickel chloride = 0.19 moles
Number of formula units =
Hence, the correct answer is Option A.