# How do you convert #5.28xx10^23# formula units of iron (III) carbonate to grams?

##### 1 Answer

Check what's given first

Number of molecules

Alright so firstly, we need to calculate the number of moles in

To calculate the number of moles we will use the formula

Number of particles = number of moles x Avogadro's Contant

Thus, since we need the number of moles, rearrange this equation to-

Number of moles = number of particles / Avogadro's constant

Thus we have

Thus we have 0.87 moles of Iron(III) Carbonate

Now that we have the number of moles, we can find the mass in grams using the equation (Moles = Mass / Molar Mass)

So since we dont have the molar mass of Iron(III) Carbonate, lets find it out

Firstly, the equation is

The molar mass of Fe -

The molar mass of C -

The molar mass of O-

Add em up all together and you have

Thus, rearranging the equation of Moles = Mass/ Molar Mass to find Mass, we have

Mass = Moles x Molar Mass

Mass =

Mass =

So

Hope this helps