# How many moles of oxygen gas will be formed from 6.45 g of potassium chlorate?

##### 1 Answer

number of moles in

#### Explanation:

This is your equation:

Assume that:

n = number of moles

m = mass of substance

M = molar mass

The mass (m) of

Now you need to find the molar mass (M) for

K = 1

Cl = 1

O = 3

Now add them all up.

39.1 + 35.5 + 48.0 = 122.6 g/mol is the molar mass (M) of

Now you can find the number of moles (n) in

*
*It's best not to round yet just so it won't give you inaccurate answer at the end.

If you look closely in your equation, you can see that the mole ratio between

If 2 moles of

then 0.05261011419 moles of

[

Note: This answer is rounded to 3 significant figures.

Sorry if my explanation is too long or not concise, but I'm still trying my best so it makes sense to you.