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

The correct answer is Option c.

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 c.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.