A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution? methanol
propanol
diethyl ether
water

Methanol is the solvent in this solution.

Explanation:

Mixtures are the union of two or more pure substances, which can be classified as heterogeneous when the components of the mixture can be observed and homogeneous when the components cannot be observed (they are not distinguished).

When the mixtures are homogeneous, it can be said that they are chemical solutions.

In a solution you can distinguish solutes and solvent. A solute is a substance that dissolves in another with which it forms a solution. The solute is normally a solid, but it can also be a liquid or a gas. It is found in a lower proportion than the solvent in a solution.

It is called a "solvent", the element that dissolves in the other. That is, the solvent is the substance that dissolves a solute, forming a homogeneous solution. This is normally a liquid, but it can also be a solid or a gas. It is found in greater proportion than the solute in a solution.

In this case, since methanol is the component that has the greatest volume, it means that it is found in a greater proportion. So methanol is the solvent in this solution.

Its (A) methanol

Explanation:

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c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml