# How do you change 8.5 g of #SiH_4# to moles?

##### 1 Answer

8.5g

#### Explanation:

When converting to moles, you always start with the mass in grams of your substance. In this case 8.5g

In order to convert to moles you will need to find the molecular mass of the molecule. You can do this using the molecular formula

Use the values on a periodic table titled "relative atomic mass" or "molecular mass" for each element. This is what a single mole of this atom would weigh.

Silicon (Si) weighs 28.09 grams.

Hydrogen (H) weighs 1.008 grams.

You have 1 Si atom and 4 H atoms, so add together the mass of 1 Si and 4 H.

Si + 4(H) = molar mass of

Now you just divide the grams of

This equation is how this process is commonly written. It begins with the grams of

8.5g