How many formula units of nis are contained in a 430. g sample of the compound?
• use 6.022 x 102 mol 1 for avogadro's number.
• report your answer in scientific notation.
• your answer should have three significant figures

Answer : The number of formula units of NiS contained are,

Explanation :

Formula units : It 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:

Mass of given sample = 430 g

Molar mass of NiS =  90.76 g/mole

First we have to calculate the moles of NiS.

Now we have to calculate the formula units of NiS.

Number of formula units =

Hence, the number of formula units of NiS contained are,

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