Answer:
0.225M
Explanation:
Step 1:
Data obtained from the question. This includes:
Volume of the stock solution (V1) = 125mL
Molarity of the stock solution (M1) = 0.90 M
Volume of the diluted solution (V2) = 125 + 375 = 500mL
Molarity of the diluted solution (M2) =..?
Step 2:
Determination of the molarity of the diluted solution.
This is obtained by using the dilution formula as follow:
M1V1 = M2V2
0.9 x 125 = M2 x 500
Divide both side by 500
M2 = (0.9 x 125) /500
M2 = 0.225M
Therefore, the molarity of the diluted solution is 0.225M
When a substance undergoes a physical change no new substance is formed.
Answer:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals.
Answer:
The Volume of the lungs that would produce 2 mmHg pressure decrease is

Explanation:
From the question we are told that
The volume of air in the lungs is 
The pressure difference for quit normal inspiration is 
The temperature of air in the lungs 
The pressure after normal expiration is at 
From ideal gas law we have that

Now since nRT is constant we have that

As the pressure decreased by 2 mmHg the volume becomes


