Question

PLEASEEEEEEE HELPPPPPPPPPP I BEGGGGG FOR HELPPPPPPP

How many formula units are in a sample of salt, NaCl, with a mass of 87.75 grams?

Answer 1

Number of Nacl units in mass of
`87.75` grams
`= 1.50`

Step-by-step explanation:

Mass of one unit of NaCl or one atom of NaCl is
`58.44` g/mol

The total mass of the NaCl is
`87.75` grams.

The number of unit in
`87.75` grams of NaCl is equal to
`87.75` grams divided by mass of one unit of NaCl i.e
`58.44` g/mol

This can be mathematically be presented as

`(87.75)/(58.44) \\` Units

`1.50` Units

Number of Nacl units in mass of
`87.75` grams
`= 1.50`