How many moles of oxygen gas will be formed from 6.45 g of potassium chlorate?
number of moles in
This is your equation:
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.