Classify the following reaction:2h2o 2h2 o2
2 answers:
The classified form of the following reaction should looke like that :
. WHat about the name of such reaction, I am pretty sure that it is called <span>decomposition. I bet you have the same in the option list, but next time check it carefully.</span>
Explanation:
When a substance or compound dissociates into two or more new compounds then this type of chemical reaction is known as decomposition reaction.
For example,
Here, water dissociates into hydrogen and oxygen molecules.
Thus, we can conclude that the given reaction is a decomposition reaction.
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Taking into account the reaction stoichiometry, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.
<h3>Reaction stoichiometry</h3>In first place, the balanced reaction is:
2 H₂O → 2 H₂ + O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- H₂O: 2 moles
- H₂: 2 moles
- O₂: 1 mole
The molar mass of the compounds is:
- H₂O: 18 g/mole
- H₂: 2 g/mole
- O₂: 32 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
- H₂O: 2 moles ×18 g/mole= 36 grams
- H₂: 2 moles ×2 g/mole= 4 grams
- O₂: 1 mole ×32 g/mole= 32 grams
The theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
<h3>Theorical yield of O₂</h3>The following rule of three can be applied: if by reaction stoichiometry 36 grams of water form 32 grams of oxygen, 29.2 grams of water form how much mass of oxygen?
<u><em>mass of oxygen= 25.956 grams</em></u>
Finally, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.
Learn more about the reaction stoichiometry:
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Option 2: 12.0 L of at STP.
The standard pressure and temperature values are 1 atm and 273.15 K.
Using the ideal gas equation, number of moles of gas can be calculated which is as follows:
PV=nRT...... (1)
Here, P is pressure, V is volume, n is number of moles, R is gas constant and T is temperature.
Also, in 1 mole of any gas there are molecules of the gas. This is known as Avogadro's number and denoted by symbol
Thus,
Equation (1) can be rewritten as follows:
On rearranging,
Here, all the other terms are constant except volume, thus, gas with volume equal to the volume of will have same number of molecules.
Volume of gas and
gas is same thus,
will have same total number of molecules as
gas.