Question

How many elements in 2NaBO3?
1
2
3
10

Answer 1

10

Step-by-step explanation:

Take a look to the chemical compound:

`NaBO_3`

Which is Sodium perborate. Its chemical composition is:

`Na=Sodium\\B=Boron\\O_3=Ozone`

In other words it has:

One sodium atom, one Boron atom and three oxygen atoms. Therefore, it has 5 elements in total.

However, as you can see the chemical compound has a coefficient of 2, so basically the number of elements of the chemical compound is multiplied by 2:

`2*5=10`

Hence, the number of elements in
`NaBO_3` is 10