Question

How many molecules are there in 1.624 gm Ferric chloride (FeCl3)?

Answer 1

Answer:

by the known formula that:-

GIVEN MASS = MOLES * MOLAR MASS

we know that molar mass of ferric chloride is 162gram

and given mass is 1.624 gram

by dividing given mass by its molar mass you will get the number of moles which is 0.001 moles

Answer 2

Given:

Weight of Ferric Chloride that is given = 1.624 gm

To Find:

Number of Molecules

Calculating:

Molar mass of Fe = 56

Molar mass of Cl = 35

First we need to calculate the molar mass of Ferric Chloride:

(FeCl3)

= 1 x 56 + 3 x 35.5

= 56 + 106.5

= 162.5 gm

Formula that we use to calculate the number of moles of a compound:

= Given Mass / Molar Mass

Substituting the values known to us in this formula we get:

= 1.624 / 162.5

Now we have to calculate the number of molecules.

The Formula That We Use To Calculate The Number Of Molecules:

= Number Of Moles x Avogadro's Number

Avogadro's Number = 6.022 x 10^23

Substituting the values known to us in this formula we get:

= 1.624 / 162.5 x 6.022 x 10^23

After simplification we get the final answer as:

= 6.023  ×  10 ^21  Molecules

Therefore, the number of molecules that are there is 6.023 x 10^21 Molecules.