(13.558 gm) · (1 L / 0.089 gm) = 152.34 L (rounded)
(fraction equal to ' 1 ') ^
Answer:
The pH of the mixture is 0.7926
Explanation:
Hi there!
The acetylsalicylic acid was completely neutralized by the sodium hydroxide so that the only protons present in the solution come from the HCl. The volume of the solution can be calculated as the addition of the volume of sodium hydroxide and the volume of HCl (assuming that the mixture is an ideal solution).
The number of moles of HCl added can be calculated as follows:
13.46 ml (0.4472 mol/1000 ml) = 6.019 × 10⁻³ mol
The volume of the solution is 13.46 ml + 23.88 ml = 37.34 ml
Then, we can calculate the concetration of protons in the solution:
[H] = 6.019 × 10⁻³ mol /0.03734 l = 0.1612 M
The pH of the mixture:
pH = -log[H]
pH = -log[0.1612] = 0.7926
Answer:
a) Definition of work, definite integration, b) , c)
Explanation:
a) The bungee-jump cord is modelled by using the integral form of the physical definition of works, as the force varies with the elongation. A definite integral is used because initial and final lengths are supposed to be known.
b) The formula for the work done is:
Where .
c) The value for x is:
The work done to stretch the cord is:
The negative sign is because the reactive nature of the elastic forces, which is antiparallel to displacement direction.
Center, to seek, curved path. Gravity us the centripetal force that keeps the planet orbiting around the sun.