How many moles of O2 can be produced by 0.7631 moles of N2O5?

2N205-->4NO2+O2

0.382 moles of oxygen are produced.

Explanation:

Given data:

Number of moles of oxygen produced = ?

Number of moles of N₂O₅ react = 0.7631 mol

Solution:

Chemical equation:

2N₂O₅      →      4NO₂ + O₂

Now we will compare the moles of O₂ with N₂O₅ .

                    N₂O₅       :          O₂

                        2         :            1

                  0.7631      ;          1/2×0.7631 = 0.382

0.382 moles of oxygen are produced.

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.