Question

The molar mass of barium nitrate (Ba(NO3)2) is 261.35 g/mol. What is the mass of 5.30 × 1022 formula units of Ba(NO3)2?

Answer 1

6 ×10^23 molcules implies 261.35 gm
5.3×10^22 molcules implies 5.3×10^22×261.35/6×10^23
=
23.1 gm

Answer 2

Answer: The mass of given formula unit of barium nitrate is 23.001 grams

Explanation:

According to mole concept:

1 mole of a compound consists of $6.022\times 10^{23}$ formula units.

And mass of 1 mole of barium nitrate is 261.35 grams.

Therefore, mass of $6.022\times 10^{23}$ formula units is 261.35 grams.

So, $5.30\times 10^{22}$ formula units will consist of $=\frac{261.35g}{6.022\times 10^{23}\times 5.30\times 10^{22}=23.001g$

Hence, the mass of given formula unit of barium nitrate is 23.001 grams.