Answer:
b. 101.02°C
Explanation:
The elevation of boiling point in a solvent due the addition of a solute is a colligative property called <em>Boiling point Elevation. </em>The formula is:
ΔT = Kb*m*i
<em>Where ΔT is change in boiling point</em>
<em>Kb is boilinig point elevation constant = 0.512°C/m for water</em>
<em>m is molality of the solution = 0.50m</em>
<em>And i is Van't Hoff Factor (4 for the Al(NO₃)₃ because its disolution produce 4 ions)</em>
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Replacing:
ΔT = 0.512°C/m*0.50m*4
ΔT = 1.02°C
As the boiling point of pure water is 100°C and the increasing is of 1.02°C, boiling point of the solution is:
101.02°C
Right option is:
<h3>b. 101.02°C</h3>
<em />
<span>It does not have a volume or settled shape. Solids have a volume and settled shape. Liquids have a volume volume and their shape is based on their container.
It can be compressed. Solids can not be compressed nor liquids.</span>
Answer:
5 molecules of O2 reacted.
Explanation:
From the question, were told that 4 molecules of NH3 reacted with O2 to form 4 molecules of NO and 6 molecules of water. To know the molecules of O2 that reacted, we must generate a balanced equation. This is illustrated below:
4NH3 + O2 —> 4NO + 6H2O
From the above equation, we have a total of 10 atoms of O2 on the right side of the equation and a total of 2 atoms of O2 on the left side. To balance the equation, put 5 in front of O2 as shown below:
4NH3 + 5O2 —> 4NO + 6H2O
Now, the equation is balanced.
From the balanced equation, 5 molecules of O2 reacted.
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