An erlenmeyer flask contains 25.00 ml of 0.500 m hcl before a titration is begun. how many moles of hydrogen ions are present in the flask at this time?
a) 0.0125
b) 12.5
c) 20.0
d) 50.0

A) 0.0125.

Explanation:

Molarity is the no. of moles of solute in 1.0 L of the solution.

M = no. of moles of HCl / V of the solution(L).

∴ no. of moles of HCl = M*V of the solution = (0.5 M)(0.025) = 0.0125 mol.

HCl → H⁺ + Cl⁻.

0.0125 mol of HCl contains 0.0125 mol of H⁺ and 0.0125 mol of Cl⁻.

So, the right choice is: A) 0.0125

A is right on e 2020

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .