Question

What is the mass of 5.30 × 1022 formula units of Ba(NO3)2?

0.09 g
12.0 g
23.0 g
3,130 g

Answer 1

Mass of
`5.30* 10^(22)` formula units of
`Ba(NO_(3))_(2)` is 23.0 g

Step-by-step explanation:

Molar mass of
`Ba(NO_(3))_(2)` is 261.337 g.

So, mass of
`6.023* 10^(23)` formula units of
`Ba(NO_(3))_(2)` is 261.337 g.

Hence mass of
`5.30* 10^(22)` formula units of
`Ba(NO_(3))_(2)` is
`(261.337* 5.30* 10^(22))/(6.023* 10^(23))` g = 23.0 g

Answer 2

To convert the formula units of a compound to its mass, the conversion factor is Avogadro's number, 6.022 x10^23 formula units/ mol and its molar mass. In this case, we are given with 5.30x1022 formula units of Barium nitrate which has a mass of 261.33 g/mol. Hence the answer is 23.00 grams.