1g of a white solid is placed into a beaker of a green-colored liquid. The color of the liquid does not change, but a gas begins to bubble up and spills over the rim of the beaker. Based on the information above, which of the following is true?
Select one:

A chemical change occurred due to the formation of a gas.

No chemical change occurred since an odor was not produced.

A chemical change occurred due to the combination of a solid and liquid.

No chemical change occurred since the color of the liquid did not change.

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

Which description best characterizes the motion of particles in a solid?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.