Answer:
As more sodium chloride is dissolved, higher is the boiling point of the solution
Explanation:
The boiling point- the temperature at which the solution boils- will increase as more solute is added. That is a colligative property called <em>boiling point elevation</em>. Colligative propeties are those that depend on the number of particles of solute in a solution. As more solute is added (sodium chloride or NaCl), more particles of solute will be present in the solution and the boiling point of the solution will be higher. The mathematical expression for the boiling point elevation (ΔTb) is the following:
ΔTb= Kb x m
Where Kb is a molal constant and m is the molality of the solution. That expression shows that the elevation of boiling point depends on the concentration of the solute expressed in terms of moles per mass of solution.
Answer: 1 mol C8H18 produces 9 mol H2O
Explanation: reaction : C8H18 + 12.5 O2 ⇒ 8 CO2 + 9 H2O
Answer:
n = 0.271 moles
Explanation:
Given that,
Volume of container, V = 14 L
Pressure of Nitrogen gas, P = 375 torr
Temperature. T = 37°C=37+273=310°C
We need to find the number of moles of nitrogen in the container. Using gas equation,
PV = nRT
R is gas constant, R = 0.082 L-atm/mol-K
Since, 1 atm=760 torr
375 torr = 0.493 atm
Now,
So, there are 0.271 moles of Nitrogen in the container.
<span>Lemon juice, pH of 2.
Vinegar, pH of 2.
<span>Coca-Cola (Coke), pH from 2 to 4.
</span>Battery acid, pH of 0.
<span>Black coffee, pH of around 5.</span></span>