Using the equation 2 H2 + O2 ---> 2 H2O determine how many grams of oxygen will be needed to form 100.0 grams of water?
2 Answers
Approx.
Explanation:
We got the stoichiometric equation...
And, therefore, we need an equivalent quantity of dioxygen gas... a mass of
177.62g (2.d.p)
Explanation:
Equation:
First, we need to calculate the moles of water.
mass: 100g
molar mass:
Now, we have to look at the ratio:
hydrogen:oxygen:water =
Therefore, looking at water and oxygen, they have the same ratio of 1:1. That means that the moles of water is equal to the moles of oxygen.
Using the same equation as earlier, we already know the following:
moles = 5.55062167
molar mass =
Rearranging the equation gives me: