Use the following equation to answer questions 2 and 3. (Use the mole ratio for these problems only!)

3NOLaTeX: _22+ HLaTeX: _22O --> 2HNOLaTeX: _33 + NO

2. How many moles of NOLaTeX: _22are required to produce 3.56 mol of HNOLaTeX: _33?

3. How many moles of water react with 2.5 mol of NOLaTeX: _22?

5.34 moles of are required to produce 3.56 mol of .

0.83 moles of water react with 2.5 moles of .

Explanation:

i)

Moles of we want to produce = 3.56 moles

According to reaction, 2 moles of are obtained from 3 moles of

Then 3.56 moles of will be obtained from :

of

5.34 moles of are required to produce 3.56 mol of .

ii)

Moles of = 2.5 moles

According to reaction,3 moles of reacts with 1 mole of ,then 2.5 moles of will react with :

of

0.83 moles of water react with 2.5 moles of .

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.