Other Conversions Volume and Heat!

As stated previously in one of the older blogs, volume at stp can be found using the conversion factor 22.4L/Mol!
Heat can be included as a separate term in chemical reactions. It's called enthalpy.

reactions that release heat are exothermic
reactions that absorb heat are endothermic!

Heres an example!

If 3.0 Grams of Aluminum Oxide decomposes, what volume of oxygen is produced?
So first, write down what you're solving for, cancel units then convert to moles. Once you have your moles, write down what you have over what you need, then convert into liters using STP. You should get your answer then!

Moles to mass to moles to mass?

Wow, that sure sounded confusing. Well, some problems you will encounter in Chemistry 11 will give you an amount of moles and will ask you to determine the mass. Converting moles to mass only requires one additional step!

Heres an example!

How many grams of water are produced if 0.24 moles of phosphoric acid is neutralized by Bariun Hydroxide?
So first write your chemical equation.Balance. Right what you're solving for, which is water! Write what you have over what you need. Then take the grams of all the elements in H20 (Hydrogen and Oxygen) and divide it by a mole. That's how you solve it!

If you're struggling, here's some tips.
1) If you're stuck, always start out by writing down your chemical equation then balance. Double check, if your equation is wrong, your answer will come out wrong.
2) Write down what you need to solve for and always remember what you need to cancel.
3) Significant Digits, always count the number of sig figs, in this question it is 2. You do not wanna lose half a mark!