# How many formula units constitute a mass of #450*g# of #"calcium carbonate"#?

##### 2 Answers

#### Answer:

Approx.

#### Explanation:

First we work out the molar quantity:

Now, by definition,

Now calcium carbonate is NOT MOLECULAR. And thus we say that there are

#### Answer:

#### Explanation:

The number of particles

Also, the definition of

Let's substitute the definition of

Then, let's substitute the value of

We now need to calculate the molar mass

Now, let's substitute this value into the equation:

Therefore, there are around