Answer:
a) 0.046 mol/L
b) 0.016 mol
c) 271.58 g/mol
Explanation:
A nonelectrolyte solute is a solute that, when dissolved in a solvent, will not make the solution a conductor, and so the electricity will not pass through it. The osmotic pressure is a colligative property, and it's the pressure difference needed to stop the flow of a solution across a semipermeable membrane. It can be calculated by:
π = MRT
Where π is the osmotic pressure, M is the molarity of the solute (mol/L), R is the ideal gas constant, and T is the temperature (in K). For a pressure in torr, R = 62.3637 torr.L/(mol.K).
a) π = MRT , T = 25°C = 298 K
851 = M*62.3637*298
18584.3826M = 851
M = 0.046 mol/L
b) The number of moles of the solute (n) is the molar concentration (molarity) multiplied by the volume. So, for a solution of 345 mL = 0.345 L,
n = 0.046 * 0.345
n = 0.016 mol
c) The molar mass (MM) is the mass divided by the number of moles:
MM = 4.31/0.016
MM = 271.58 g/mol
Answer: C. 20
Explanation: One equation for the equilibrium constant is ![\frac{[Products]}{[Reactants]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BProducts%5D%7D%7B%5BReactants%5D%7D)
. The products are typically on the left side and the reactants on the right.
Given this and the values of each, we can easily plug this in. However, we must multiply the products instead of adding them.
19.888 can be easily rounded to 20, meaning that C is the best answer.
I hope this helps! Pls mark brainliest!! :)
Answer: C. neon gas
Explanation: There are three states of matter:
A. Solid iron: The molecules in solid are very tightly packed as inter molecular forces are very high. There is very less space between the particles and thus the molecules can not be compressed. They have fixed shape and volume.
B. liquid bromine: The molecules in liquid are less tightly packed as inter molecular forces are not very high. There is less space between the particles and thus the molecules can not be compressed. They have fixed volume and take the shape of the container.
C. neon gas : The molecules in gas are very less tightly packed as inter molecular forces are very low. There is large vacant space between the particles and thus the molecules can be compressed. They neither have fixed volume nor a fixed shape.They occupy complete volume of the container in which it is put.
D. sugar crystals: The molecules in solid are very tightly packed as inter molecular forces are very high. There is very less space between the particles and thus the molecules can not be compressed. They have fixed shape and volume.
Answer:
smaller populations
Explanation:
in small, reproductively isolated populations, special circumstances exist that can produce rapid changes in gene frequencies totally independent of mutation and natural selection.
Uh to warn you it doesn't show anything on here=(
