Agaseous mixture composed of 20% ch4, 30% c2h4, 35% c2h2, and 15% c2h20. what is the average molecular weight of the mixture? a) 20 b) 9.25 c) 25 d) 6.75

The correct answer is Option d.

Explanation:

We are given:

Mass percentage of = 20 %

So, mole fraction of = 0.2

Mass percentage of = 30 %

So, mole fraction of = 0.3

Mass percentage of = 35 %

So, mole fraction of = 0.35

Mass percentage of = 15 %

So, mole fraction of = 0.15

We know that:

Molar mass of = 16 g/mol

Molar mass of = 28 g/mol

Molar mass of = 26 g/mol

Molar mass of = 48 g/mol

To calculate the average molecular mass of the mixture, we use the equation:

where,

= mole fractions of i-th species

= molar masses of i-th species

= number of observations

Putting values in above equation:

Hence, the correct answer is Option d.

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 .